SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

(Mark One)

[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 2005 or
[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934
For the transition period from ________ to ________

Commission file No. 1-7259

Southwest Airlines Co.
(Exact name of registrant as specified in its charter)

               TEXAS                                      74-1563240
   (State or other jurisdiction of                       (IRS Employer
    incorporation or organization)                     Identification No.)

    P.O. Box 36611, Dallas, Texas                          75235-1611
(Address of principal executive offices)                   (Zip Code)

Registrant's telephone number, including area code: (214) 792-4000

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [ ]

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act.) Yes [X] No [ ]

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

Number of shares of Common Stock outstanding as of the close of business on April 13, 2005:

784,751,947


SOUTHWEST AIRLINES CO.
FORM 10-Q

Part I - FINANCIAL INFORMATION

Item 1. Financial Statements

                           Southwest Airlines Co.
                    Condensed Consolidated Balance Sheet
                               (in millions)
                                (unaudited)
                                                  March 31,      December 31,
                                                     2005            2004
ASSETS
Current assets:
      Cash and cash equivalents                      $1,908          $1,048
      Short-term investments                              -             257
      Accounts and other receivables                    334             248
      Inventories of parts and supplies, at cost        128             137
      Fuel hedge contracts                              790             428
      Prepaid expenses and other current assets          75              54
          Total current assets                        3,235           2,172

Property and equipment, at cost:
      Flight equipment                               10,354          10,037
      Ground property and equipment                   1,220           1,202
      Deposits on flight equipment
        purchase contracts                              646             682
                                                     12,220          11,921
      Less allowance for depreciation
        and amortization                              3,210           3,198
                                                      9,010           8,723
Other assets                                          1,009             442
                                                    $13,254         $11,337

LIABILITIES & STOCKHOLDERS' EQUITY
Current liabilities:
      Accounts payable                                 $471            $420
      Accrued liabilities                             1,611           1,047
      Air traffic liability                             724             529
      Current maturities of long-term debt               74             146
          Total current liabilities                   2,880           2,142

Long-term debt less current maturities                1,926           1,700
Deferred income taxes                                 1,975           1,610
Deferred gains from sale and leaseback of aircraft      148             152
Other deferred liabilities                              210             209
Stockholders' equity:
      Common stock                                      790             790
      Capital in excess of par value                    299             299
      Retained earnings                               4,138           4,089
      Accumulated other comprehensive income            972             417
      Treasury stock, at cost                           (84)            (71)
          Total stockholders' equity                  6,115           5,524
                                                    $13,254         $11,337
See accompanying notes.


                           Southwest Airlines Co.
                 Condensed Consolidated Statement of Income
                   (in millions, except per share amounts)
                                (unaudited)
                                           Three months ended
                                                March 31,
                                            2005         2004
OPERATING REVENUES:
  Passenger                               $1,592       $1,428
  Freight                                     34           25
  Other                                       37           31
    Total operating revenues               1,663        1,484

OPERATING EXPENSES:
  Salaries, wages, and benefits              640          589
  Fuel and oil                               279          230
  Maintenance materials and repairs              101          114
  Aircraft rentals                            43           45
  Landing fees and other rentals             113          103
  Depreciation and amortization              112          103
  Other operating expenses                   269          254
    Total operating expenses               1,557        1,438

OPERATING INCOME                             106           46

OTHER EXPENSES (INCOME):
  Interest expense                            27           19
  Capitalized interest                        (9)         (10)
  Interest income                             (7)          (4)
  Other (gains) losses, net                  (19)           -
    Total other expenses (income)             (8)           5



INCOME BEFORE INCOME TAXES                   114           41
PROVISION FOR INCOME TAXES                    38           15


NET INCOME                                   $76          $26


NET INCOME PER SHARE, BASIC                $ .10        $ .03
NET INCOME PER SHARE, DILUTED              $ .09        $ .03

WEIGHTED AVERAGE SHARES OUTSTANDING:
    Basic                                    784          785
    Diluted                                  812          817

See accompanying notes.


                           Southwest Airlines Co.
              Condensed Consolidated Statement of Cash Flows
                               (in millions)
                                (unaudited)

                                                       Three months ended
                                                            March 31,
                                                      2005            2004
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net income                                         $76             $26
    Adjustments to reconcile net income to
      cash provided by operating activities:
        Depreciation and amortization                  112             103
        Deferred income taxes                           38              16
        Amortization of deferred gains on sale and
          leaseback of aircraft                         (4)             (4)
        Amortization of scheduled airframe
          inspections & repairs                         11              14
        Changes in certain assets and liabilities:
          Accounts and other receivables               (86)            (47)
          Other current assets                         (12)            (15)
          Accounts payable and accrued liabilities     593             123
          Air traffic liability                        195             238
        Other                                          (37)            (37)
            Net cash provided by
              operating activities                     886             417

CASH FLOWS FROM INVESTING ACTIVITIES:
    Purchases of property and equipment, net          (423)           (360)
    Change in short-term investments                   257              39
    Acquisition of assets from ATA Airlines, Inc.       (6)              -
          Net cash used in investing activities       (172)           (321)

CASH FLOWS FROM FINANCING ACTIVITIES:
    Issuance of long-term debt                         300              29
    Proceeds from Employee stock plans                  19              13
    Payments of long-term debt and
      capital lease obligations                       (108)             (7)
    Payments of cash dividends                          (7)             (7)
    Repurchase of common stock                         (55)           (125)
    Other, net                                          (3)             (1)
           Net cash provided by (used in)
             financing activities                      146             (98)

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS   860              (2)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD     1,048           1,484

CASH AND CASH EQUIVALENTS AT END OF PERIOD          $1,908          $1,482

CASH PAYMENTS FOR:
  Interest, net of amount capitalized                  $16             $13
  Income taxes                                          $-              $-

See accompanying notes.


Southwest Airlines Co.

Notes to Condensed Consolidated Financial Statements


(unaudited)

1. BASIS OF PRESENTATION

The accompanying unaudited condensed consolidated financial statements of Southwest Airlines Co. (Company or Southwest) have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. The unaudited condensed consolidated financial statements for the interim periods ended March 31, 2005 and 2004, include all adjustments, which are, in the opinion of management, necessary for a fair presentation of the results for the interim periods. This includes all normal and recurring adjustments, and other accounting entries as described herein. The Condensed Consolidated Balance Sheet as of December 31, 2004, has been derived from the Company's audited financial statements as of that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Financial results for the Company, and airlines in general, are seasonal in nature. Historically, the Company's second and third fiscal quarters have been more profitable than its first and fourth fiscal quarters. Operating results for the three months ended March 31, 2005, are not necessarily indicative of the results that may be expected for the year ended December 31, 2005. For further information, refer to the consolidated financial statements and footnotes thereto included in the Southwest Airlines Co. Annual Report on Form 10-K for the year ended December 31, 2004.

Certain prior period amounts have been reclassified to conform to the current presentation. In the Condensed Consolidated Balance Sheet as of December 31, 2004, the Company has reclassified certain amounts as "Short-term investments", that were previously classified as "Cash and cash equivalents." In the Condensed Consolidated Statement of Cash Flows for the period ended March 31, 2004, changes in the amounts of "Short-term investments" are classified as cash flows from investing activities. In the Condensed Consolidated Statement of Income for the period ended March 31, 2004, amounts previously classified as "Agency commissions" are now classified in "Other operating expenses."

2. STOCK-BASED EMPLOYEE COMPENSATION

The Company has stock-based compensation plans covering the majority of its Employee groups, including plans adopted via collective bargaining, a plan covering the Company's Board of Directors, and plans related to employment contracts with certain Executive Officers of the Company. The Company accounts for stock-based compensation utilizing the intrinsic value method in accordance with the provisions of Accounting Principles Board Opinion No.
25 (APB 25), "Accounting for Stock Issued to Employees" and related Interpretations. Accordingly, no compensation expense is recognized for


fixed option plans because the exercise prices of Employee stock options equal or exceed the market prices of the underlying stock on the dates of grant. See Note 11 for additional information.

The following table represents the effect on net income and earnings per share if the Company had applied the fair value based method and recognition provisions of Statement of Financial Accounting Standards (SFAS) No. 123, "Accounting for Stock-Based Compensation," to stock-based Employee compensation (in millions, except per share amounts):

                                           Three months ended March 31,
                                               2004         2003
Net income, as reported                         $76          $26
Add: Stock-based Employee compensation
   expense included in reported income,
   net of related tax effects                     -            -
Deduct:  Total stock-based Employee
  compensation expense determined under
  fair value based methods for all awards,
  net of related tax effects                    (12)         (12)

Pro forma net income                            $64          $14

Net income per share
  Basic, as reported                           $.10         $.03
  Basic, pro forma                             $.08         $.02

  Diluted, as reported                         $.09         $.03
  Diluted, pro forma                           $.08         $.02

3. DIVIDENDS

During the three month period ended March 31, 2005, dividends of $.0045 per share were declared on the 783 million shares of common stock then outstanding. During the three month period ended March 31, 2004, dividends of $.0045 per share were declared on the 784 million shares of common stock then outstanding.

4. NET INCOME PER SHARE

The following table sets forth the computation of basic and diluted net income per share (in millions except per share amounts):

                                          Three months ended March 31,
                                              2004           2003
NUMERATOR:
  Net income available to
    common stockholders                        $76           $26

DENOMINATOR:
  Weighted-average shares
    outstanding, basic                         784           785
  Dilutive effect of Employee stock
    Options                                     28            32
  Adjusted weighted-average shares
    outstanding, diluted                       812           817

NET INCOME PER SHARE:
  Basic                                       $.10          $.03
  Diluted                                     $.09          $.03

5. FINANCIAL DERIVATIVE INSTRUMENTS

Fuel Contracts - Airline operators are inherently dependent upon energy to operate and, therefore, are impacted by changes in jet fuel prices. Jet fuel and oil consumed in the three month periods ended March 31, 2005 and 2004, represented approximately 17.9 percent and 16.0 percent, respectively, of Southwest's operating expenses for those periods. The Company endeavors to acquire jet fuel at the lowest possible prices. Because jet fuel is not traded on an organized futures exchange, liquidity for jet fuel hedging is limited. However, the Company has found commodities for effective hedging of jet fuel costs, primarily crude oil, heating oil, and unleaded gasoline. The Company utilizes financial derivative instruments as hedges to decrease its exposure to jet fuel price increases. The Company does not purchase or hold any derivative financial instruments for trading purposes.

The Company utilizes financial derivative instruments for both short-term and long-term time frames. In addition to the significant hedging positions the Company had in place for the first three months of 2005, the Company also has significant future hedging positions. The Company currently has a mixture of purchased call options, collar structures, and fixed price swap agreements in place to hedge approximately 85 percent of its remaining 2005 total anticipated jet fuel requirements that effectively cap crude oil-equivalent prices at $26 per barrel. As of March 31, 2005, the "spot" market price for a barrel of crude oil was over $55. The Company is also 65 percent hedged for 2006 at approximately $32 per barrel, over 45 percent hedged for 2007 at approximately $31 per barrel, 30 percent hedged for 2008 at approximately $33 per barrel, and 25 percent hedged for 2009 at approximately $35 per barrel. As of March 31, 2005, the majority of the Company's remaining 2005 hedges are effectively in the form of unleaded gasoline-based and heating oil-based option contracts. The majority of the remaining hedge positions are crude oil-based positions.

The Company accounts for its fuel hedge derivative instruments as cash flow hedges, as defined in Statement of Financial Accounting Standards No. 133, Accounting for Derivative Instruments and Hedging Activities, as amended (SFAS 133). All changes in fair value that are considered to be effective, as defined, are recorded in "Accumulated other comprehensive income" until the underlying jet fuel is consumed. The fair value of the Company's financial derivative instruments at March 31, 2005, was a net asset of approximately $1.7 billion. The current portion of this net asset, approximately $790 million, is classified as "Fuel hedge contracts" and the noncurrent portion, approximately $929 million, is classified in "Other


assets" in the Condensed Consolidated Balance Sheet. The fair value of the derivative instruments, depending on the type of instrument, was determined by the use of present value methods or standard option value models with assumptions about commodity prices based on those observed in underlying markets.

During the three months ended March 31, 2005 and 2004, the Company recognized $155 million and $63 million in gains in "Fuel and oil" expense, respectively, from hedging activities. During the three months ended March 31, 2005 and 2004, the Company also recognized approximately $27 million and $6 million, respectively, of additional income in "Other (gains) losses, net," related to the ineffectiveness of its hedges. Ineffectiveness is inherent in hedging jet fuel with derivative positions based in other crude oil related commodities, especially given the magnitude of the current fair market value of the Company's fuel hedge derivatives. Due to the volatility in markets for crude oil and crude oil related products, the Company is unable to predict the amount of ineffectiveness each period, which may result in increased volatility in the Company's results. The significant increase in the amount of noncash ineffectiveness recorded during first quarter 2005 was primarily due to the significant increase in energy prices compared to prior periods, the number of derivative positions the Company holds, as well as volatility between the different types of products the Company uses in hedging-specifically between crude oil and heating oil. As the fair value of the Company's hedge positions gets larger in amount, there is a higher degree of probability that there will be more variability in noncash ineffectiveness recorded in the income statement as small differences in the correlation of crude oil related products is leveraged over large dollar volumes. The Company also recognized approximately $9 million and $6 million of net expense, respectively, related to amounts excluded from the Company's measurements of hedge effectiveness, in "Other (gains) losses, net" during first quarter 2005, and first quarter 2004.

As of March 31, 2005, the Company had approximately $971 million in unrealized gains, net of tax, in "Accumulated other comprehensive income" related to fuel hedges. Included in this total are approximately $456 million in net unrealized gains that are expected to be realized in earnings during the twelve months following March 31, 2005.

Interest Rate Swaps - In previous periods, the Company has entered into interest rate swap agreements relating to its $350 million 5.25% senior unsecured notes due October 1, 2014, its $385 million 6.5% senior unsecured notes due March 1, 2012 and its $375 million 5.496% Class A-2 pass-through certificates due November 1, 2006. Under these interest rate swap agreements, the Company pays the London InterBank Offered Rate (LIBOR) plus a margin every six months on the notional amount of the debt, and receives the fixed stated rate of the notes every six months until the date the notes become due.

The Company's interest rate swap agreements qualify as fair value hedges, as defined by SFAS 133. The fair value of the interest rate swap agreements, which are adjusted regularly, are recorded in the Company's balance sheet as an asset or liability, as necessary, with a corresponding adjustment to the carrying value of the long-term debt. The fair value of the interest rate swap agreements, excluding accrued interest, at March 31, 2005 was a liability of approximately $37 million. This amount is recorded in "Other


deferred liabilities" in the unaudited Condensed Consolidated Balance Sheet. In accordance with fair value hedging, the offsetting entry is an adjustment to decrease the carrying value of long-term debt.

6. COMPREHENSIVE INCOME

Comprehensive income included changes in the fair value of certain financial derivative instruments, which qualify for hedge accounting, and unrealized gains and losses on certain investments. For first quarter 2005, the Company's comprehensive income increased significantly, due to the substantial change in the fair value of the Company's hedges. Since comprehensive income is reported net of tax, there was also a significant increase in the Company's deferred tax liability compared to December 31, 2004. See Note 5 for further information. Comprehensive income totaled $631 million and $88 million, respectively, for the three months ended March 31, 2005 and 2004, respectively. The differences between net income and comprehensive income for each of these periods was as follows (in millions):

                                           Three months ended March 31,
                                               2004           2003
Net income                                      $76            $26
  Unrealized gain (loss) on
   derivative instruments,
    net of deferred taxes of $352 and $40       555             61
  Other, net of deferred taxes of $0 and $1       -              1
  Total other comprehensive income              555             62

Comprehensive income                           $631            $88

A rollforward of the amounts included in "Accumulated other comprehensive income," net of taxes, is shown below (in millions):

                                                             Accumulated
                                    Fuel                        other
                                    hedge                    comprehensive
                                  derivatives    Other       income (loss)
Balance at December 31, 2004       $  416        $  1          $  417
  2005 changes in value               644           -             644
  Reclassification to earnings        (89)          -             (89)
Balance at March 31, 2005          $  971        $  1          $  972

7. CONSOLIDATION OF RESERVATIONS CENTERS

In November 2003, the Company announced the consolidation of its nine Reservations Centers into six, effective February 28, 2004. This decision was made in response to the established shift by Customers to the internet as a preferred way of booking travel. The Company's website, southwest.com, now accounts for more than half of ticket bookings and, as a consequence, demand for phone contact has dramatically decreased. During first quarter


2004, the Company closed its Reservations Centers located in Dallas, Texas, Salt Lake City, Utah, and Little Rock, Arkansas. The Company provided the 1,900 affected Employees at these locations the opportunity to relocate to another of the Company's remaining six centers. Those Employees choosing not to relocate, approximately 55% of the total affected, were offered support packages, which included severance pay, flight benefits, medical coverage, and job-search assistance, depending on length of service with the Company. The total cost associated with the Reservations Centers consolidation, recognized in first quarter 2004, was approximately $18 million. Employee severance and benefit costs of $13 million were recorded in "Salaries, wages, and benefits," and the majority of other costs were reflected in "Other operating expenses" in the Condensed Consolidated Statement of Income. Of the total amount expensed, approximately $2 million remained accrued (not yet paid) as of March 31, 2005.

8. LONG-TERM DEBT

During February 2005, the Company issued $300 million senior unsecured Notes (Notes) due 2017. The Notes bear interest at 5.125 percent, payable semi- annually in arrears, with the first payment due on September 1, 2005. Southwest used the net proceeds from the issuance of the Notes, approximately $296 million, for general corporate purposes.

During first quarter 2005, the Company redeemed its $100 million senior unsecured 8% Notes on their maturity date of March 1, 2005.

9. OTHER ASSETS AND ACCRUED LIABILITIES

                                           March 31,      December 31,
                                             2005            2004
Noncurrent fuel hedge contracts,
  at fair value                              $929            $368
Other                                          80              74
  Other assets                             $1,009            $442

                                           March 31,      December 31,
                                             2005            2004
Counterparty fuel hedge deposits             $820            $330
Accrued vacation pay                          123             120
Accrued aircraft rent                         114             127
Accrued profitsharing                         109              89
Deferred income taxes                         243             218
Other                                         202             163
  Accrued liabilities                      $1,611          $1,047

10. POSTRETIREMENT BENEFITS

The following table sets forth the Company's periodic postretirement benefit cost for each of the interim periods identified:


                                        Three months ended March 31,
(In millions)                               2005           2004
Service cost                                 $3             $3
Interest cost                                 1              1
Amortization of prior service cost            -              1
Recognized actuarial loss                     -              -

Net periodic postretirement benefit cost     $4             $5

11. RECENTLY ISSUED ACCOUNTING STANDARDS

In December 2004, the FASB issued SFAS No. 123R, "Share-Based Payment". SFAS No. 123R is a revision of SFAS No. 123, "Accounting for Stock Based Compensation", and supersedes APB 25. Among other items, SFAS 123R eliminates the use of APB 25 and the intrinsic value method of accounting, and requires companies to recognize the cost of employee services received in exchange for awards of equity instruments, based on the grant date fair value of those awards, in the financial statements. The effective date of SFAS 123R is the first reporting period beginning after June 15, 2005, which is third quarter 2005 for calendar year companies, although early adoption is allowed. However, on April 14, 2005, the Securities and Exchange Commission (SEC) announced that the effective date of SFAS 123R will be suspended until January 1, 2006, for calendar year companies.

SFAS 123R permits companies to adopt its requirements using either a "modified prospective" method, or a "modified retrospective" method. Under the "modified prospective" method, compensation cost is recognized in the financial statements beginning with the effective date, based on the requirements of SFAS 123R for all share-based payments granted after that date, and based on the requirements of SFAS 123 for all unvested awards granted prior to the effective date of SFAS 123R. Under the "modified retrospective" method, the requirements are the same as under the "modified prospective" method, but also permits entities to restate financial statements of previous periods based on proforma disclosures made in accordance with SFAS 123.

The Company currently utilizes a standard option pricing model (i.e., Black- Scholes) to measure the fair value of stock options granted to Employees. While SFAS 123R permits entities to continue to use such a model, the standard also permits the use of a "lattice" model. The Company has not yet determined which model it will use to measure the fair value of employee stock options upon the adoption of SFAS 123R.

SFAS 123R also requires that the benefits associated with the tax deductions in excess of recognized compensation cost be reported as a financing cash flow, rather than as an operating cash flow as required under current literature. This requirement will reduce net operating cash flows and increase net financing cash flows in periods after the effective date. These future amounts cannot be estimated because they depend on, among other things, when employees exercise stock options.


The Company currently expects to adopt SFAS 123R effective January 1, 2006, based on the new effective date announced by the SEC; however, the Company has not yet determined which of the aforementioned adoption methods it will use. In addition, the Company has not yet determined the financial statement impact of adopting SFAS 123R for periods beyond 2005.

Item 2. Management's Discussion and Analysis of Financial Condition and
Results of Operations

Comparative Consolidated Operating Statistics

Relevant Southwest comparative operating statistics for the three months ended March 31, 2005 and 2004 are as follows:

                                      Three months ended March 31,
                                          2005           2004          Change
Revenue passengers carried            17,474,490      15,995,061        9.2 %
Enplaned passengers                   19,780,746      18,190,404        8.7 %
Revenue passenger miles (RPMs) (000s) 13,238,009      11,792,423       12.3 %
Available seat miles (ASMs) (000s)    20,231,599      18,381,592       10.1 %
Load factor                                65.4%           64.2%     1.2 pts.
Average length of passenger haul (miles)     758             737        2.8 %
Average aircraft stage length (miles)        596             568        4.9 %
Trips flown                              249,119         238,469        4.5 %
Average passenger fare                    $91.15          $89.28        2.1 %
Passenger revenue yield per RPM (cents)    12.03           12.11       (0.7)%
Operating revenue yield per ASM (cents)     8.22            8.07        1.9 %
Operating expenses per ASM (cents)          7.70            7.82       (1.5)%
Operating expenses per ASM,
  excluding fuel (cents)                    6.32            6.57       (3.8)%
Fuel costs per gallon,
  excluding fuel tax (cents)                90.3            79.6       13.4 %
Fuel consumed, in gallons (millions)         307             287        7.0 %
Number of Employees at period-end         30,974          31,522       (1.7)%
Size of fleet at period-end                  424             393        7.9 %

Material Changes in Results of Operations

Summary

The operating environment for airlines continued to present significant challenges for the industry during first quarter 2005. The price of fuel, an airline's second largest expense after labor, reached record-high levels, and stubbornly remained at historically elevated levels, with crude oil prices exceeding $45 per barrel for nearly the entire first quarter 2005. What makes this especially significant is not the fact that prices have spiked upwards-brief ascents are common occurrences for volatile commodities such as energy-but the fact that prices have remained at historically high


levels for a significant period of time. This has not happened in past periods. Fortunately, the Company's hedging program greatly mitigated these record-high market fuel prices during first quarter 2005, as hedging gains reduced fuel and oil expense by $155 million. In addition, the Company recorded $27 million in "Other gains" in accordance with SFAS 133. See Note 5 to the unaudited condensed consolidated financial statements. However, even with the Company's strong hedging position, fuel cost per gallon increased 13.4 percent versus the same prior year period.

Despite this cost pressure and the weak airline industry revenue environment, first quarter 2005 was the Company's 56th consecutive quarterly profit and represented a significant increase in profits compared to first quarter 2004.. The Company's first quarter 2005 net income was $76 million ($.09 per share, diluted), an increase of $50 million, or 192.3 percent, compared to first quarter 2004 net income of $26 million ($.03 per share, diluted). Operating income increased $60 million, or 130.4 percent compared to first quarter 2004. This significant increase in operating income was due to a 1.9 percent increase in RASM (revenue per available seat mile) and to the Company's ongoing cost reduction efforts, which resulted in a 1.5 percent decrease in CASM (cost per available seat mile.)

A portion of the CASM decrease was due to first quarter 2004 costs associated with the Company's Reservations Centers consolidation. Excluding these costs, however, year-over-year unit costs also decreased slightly. See Note 7 to the unaudited condensed consolidated financial statements for more information on the Reservations Centers consolidation. The decrease was in part due to an increase in the productivity of the Company's workforce. As a result, the Company has been able to expand flights while simultaneously decreasing overall headcount. At March 31, 2005, the Company's headcount per aircraft was 73 versus a year-ago level of 80. Items contributing to the reduction in headcount include: shifting ticket distribution to the internet, allowing the Company to decrease its investment in "brick and mortar" reservations centers (see Note 7 to the unaudited condensed consolidated financial statements); the use of RAPID CHECK-IN kiosks at the airport; the ability to obtain boarding passes via the internet at www.southwest.com; initiatives to re-allocate headcount by offering transfer opportunities to Employees in departments that may be overstaffed to areas where the Company is continuing to grow; and during 2004 offering a voluntary early out option to all of its Employees, except officers. These and other initiatives helped the Company to absorb cost pressures, such as higher wage rates and the increase in fuel prices.

Based on recent trends, the Company does not expect second quarter 2005 unit costs, excluding fuel, to significantly exceed first quarter 2005's 6.32 cents per ASM. The Company also expects our 2005 annual CASM, excluding fuel, to be in line with, or below, 2004 levels. The Company will also begin service to Pittsburgh, Pennsylvania, in May 2005.

Comparison of three months ended March 31, 2005, to three months ended March 31, 2004

Revenues

Consolidated operating revenues increased by $179 million, or 12.1 percent, primarily due to a $164 million, or 11.5 percent, increase in


passenger revenues. The increase in passenger revenues was primarily due to a 12.3 percent increase in revenue passenger miles (RPMs) flown.

First quarter 2005 capacity, as measured by available seat miles (ASMs), increased 10.1 percent compared to first quarter 2004. The capacity increase resulted from the net addition of 31 aircraft (net of 21 retirements) since the end of first quarter 2004. The first quarter 2005 load factor was 65.4 percent, an increase of 1.2 points compared to 2004. The Company also experienced a 9.2 percent increase in revenue passengers carried compared to first quarter 2004.

The first quarter 2005 passenger yield per RPM decreased .7 percent to 12.03 cents from 12.11 cents in first quarter 2004. The lower RPM yield was primarily due to heavy fare discounting arising as a result of the glut in industry seats available, but was partially offset by modest fare increases since first quarter 2004. Unit revenue (operating revenue per ASM) increased 1.9 percent to 8.22 cents compared to first quarter 2004, however, as higher load factors and stronger freight and other revenues slightly offset the decline in RPM yield. The Company's March and first quarter 2005 passenger traffic benefited from the inclusion of the Easter Holiday, compared to 2004, when Easter fell in April. Revenue trends were also favorably impacted by the Company's recent codeshare agreement with ATA Airlines Inc., and by competitive capacity reductions in certain markets. At the current juncture, it appears likely that, due to the timing of the Easter holiday, second quarter 2005 load factors will decline relative to last year's record levels. Therefore, it is difficult to predict whether or not the Company will have favorable year-over-year passenger unit revenue comparisons in second quarter 2005. However, since April 2005 unit revenue could be down as much as 5 percent on a year-over-year basis, it will be a challenge to match second quarter 2004's unit revenue of 9.14 cents.

Consolidated freight revenues increased by $9 million, or 36.0 percent. Approximately 75 percent of the increase was due to an increase in mail revenues, as the U.S. Postal Service shifted more business to commercial carriers. The Company epxects year-over-year freight revenue growth in second quarter 2005; however, at a lower rate than in first quarter 2005. Other revenues increased by $6 million, or 19.4 percent, compared to first quarter 2004 primarily due to a 21.8 percent increase in commissions earned from programs the Company sponsors with certain business partners, such as the Company sponsored Chase Visa card. The Company expects second quarter 2005 revenues to be similar to first quarter 2005's Other revenues of $37 million.

Operating expenses

To a large extent, changes in operating expenses for airlines are driven by changes in capacity, or ASMs. The following presents Southwest's operating expenses per ASM for the three months ended March 31, 2005 and 2004, followed by explanations of changes on a per-ASM basis:

                              Three months ended March 31,  Per ASM   Percent
                                   2005          2004        Change   Change
Salaries, wages, and benefits      3.16          3.21        (.05)    (1.6)
Fuel and oil                       1.38          1.25         .13     10.4
Maintenance materials
  and repairs                       .50           .62        (.12)   (19.4)
Aircraft rentals                    .21           .24        (.03)   (12.5)
Landing fees and other rentals      .56           .56           -        -
Depreciation                        .55           .56        (.01)    (1.8)
Other operating expenses           1.34          1.38        (.04)    (2.9)

Total                              7.70          7.82        (.12)    (1.5)


Operating expenses per ASM were 7.70 cents, a 1.5 percent decrease compared to 7.82 cents for first quarter 2004. The CASM decrease was driven primarily by lower maintenance costs and lower salaries, wages, and benefits, partially offset by higher fuel and oil expense. Excluding fuel, CASM was 3.8 percent lower than first quarter 2004, at 6.32 cents per ASM.

Salaries, wages, and benefits expense per ASM decreased 1.6 percent. In first quarter 2004, salaries, wages, and benefits included approximately $13 million of costs related to severance and relocation packages and a reduction of approximately $3 million in profitsharing expense associated with the consolidation of the Company's reservations operations. See Note 7 to the condensed consolidated financial statements for further information on the Company's Reservations Centers consolidation. Excluding these costs, salaries, wages, and benefits were basically flat on a per ASM basis compared to first quarter 2004. Higher average wage rates and higher profitsharing expense per ASM from the increase in earnings were offset by continued productivity efforts that have enabled the Company to reduce headcount while continuing to grow its aircraft fleet. The Company expects these trends to continue and to experience lower year-over-year unit cost in Salaries, wages, and benefits in second quarter 2005, excluding the second quarter 2004 costs incurred associated with the Company's voluntary early-out plan offered to all Employees except officers, and charges associated with the Company's labor agreement with its Flight Attendants.

Fuel and oil expense per ASM increased 10.4 percent primarily due to an increase in the average jet fuel price per gallon. The average fuel cost per gallon in first quarter 2005 was 90.3 cents, 13.4 percent higher than first quarter 2004, including the effects of hedging activities. For first quarter 2005, the Company was hedged for 86 percent of its fuel needs, resulting in gains recorded in fuel and oil expense of $155 million. In other efforts to control fuel expense, the Company has added Blended Winglets to all of its Boeing 737-700 aircraft. These enhancements extend the range of these aircraft, enable the aircraft to burn less fuel, lower potential engine maintenance costs, and reduce takeoff noise. All new 737-700 aircraft now arrive from Boeing with winglets already installed. The Company expects annual fuel consumption savings of approximately three percent for each aircraft outfitted with the winglets. For second quarter 2005, the Company has fuel hedges in place for approximately 83 percent of its expected fuel consumption with a combination of derivative instruments that effectively cap prices at approximately $26 per barrel of crude oil. The majority of the Company's near term hedge positions are in the form of option contracts. During the first three months of 2005, because of the continued rise in energy prices, the fair values of the Company's fuel hedge contracts have increased significantly. At March 31, 2005, the estimated gross fair value of these contracts was $1.7 billion. See Note 5 to the unaudited condensed consolidated financial statements for further discussion of the Company's hedging activities.


Maintenance materials and repairs per ASM decreased 19.4 percent primarily due to a decrease in repair events for aircraft engines. The Company currently expects a similar year-over-year decline in maintenance materials and repairs per ASM for second quarter 2005, primarily due to less scheduled maintenance activity.

Aircraft rentals per ASM decreased 12.5 percent compared to first quarter 2004. The majority of the decrease per ASM was due to the Company's growth occurring with purchased aircraft. All of the aircraft acquired in 2004, except for one, and all of the aircraft acquired in 2005, are owned by the Company. The Company currently expects a similar year-over-year decline in aircraft rentals per ASM for second quarter 2005.

Landing fees and other rentals per ASM were flat compared to first quarter 2004, as higher landing fees per ASM were offset by a decline in other rentals per ASM. The Company experienced an 8.0 percent increase in landing fees per ASM, primarily due to higher rates paid. There was a 6.5 percent decrease in other rentals expense per ASM, primarily due to first quarter 2005 credits from airports' audits of prior periods. The Company currently expects second quarter 2005 landing fees and other rentals per ASM to be flat or slightly up from second quarter 2004.

Depreciation expense per ASM decreased 1.8 percent primarily due to the retirement of equipment associated with the Company's 737-200 aircraft, the remainder of which were phased out of the Company's fleet in January 2005. The Company currently expects depreciation per ASM to be comparable to first quarter 2005.

Other operating expenses per ASM decreased 2.9 percent compared to first quarter 2004. Approximately half of the decrease was due to certain first quarter 2004 asset write-offs, including assets written off in connection with the Reservations Centers consolidation. See Note 7 to the condensed consolidated financial statements. The remainder of the decrease was primarily due to lower personnel costs, principally moving costs incurred in first quarter 2004, also associated with the Reservations Centers consolidation. These and other smaller decreases were partially offset by higher fuel sales taxes due to the substantial increase in fuel prices. The Company currently expects Other operating expenses per ASM for second quarter 2005 to approximate the 1.34 cents per ASM experienced in first quarter 2005.

Through the 2003 Emergency Wartime Supplemental Appropriations Act, the federal government has continued to provide supplemental third-party war-risk insurance coverage to commercial carriers for renewable 60-days periods, at substantially lower premiums than prevailing commercial rates and for levels of coverage not available in the commercial market. The government-provided supplemental coverage from the Wartime Act is currently set to expire on August 31, 2005, but is currently expected to be extended to December 31, 2005. If such coverage is not extended by the government beyond either of these dates, the Company could incur substantially higher insurance costs.

Other

Interest expense increased 42.1 percent compared to first quarter 2004. The majority of the increase was due to the issuance of new debt, including the Company's September 2004 issuance of $350 million senior unsecured Notes,


fourth quarter 2004 issuance of $112 million of French credit agreements, and the February 2005 issuance of $300 million senior unsecured Notes. These new issuances were partially offset by the November 2004 redemption of $175 million aircraft secured Notes, and the March 2005 redemption of $100 million senior unsecured Notes. See Note 8 to the unaudited condensed consolidated financial statements for more information.

Capitalized interest decreased by $1 million, or 10.0 percent, primarily due to a decrease in progress payment balances for future aircraft deliveries.

Interest income increased by $3 million, or 75.0 percent, primarily due to an increase in rates earned on cash and investment balances.

"Other (gains) losses, net" primarily includes amounts recorded in accordance with SFAS 133. See Note 5 to the unaudited condensed consolidated financial statements for more information on the Company's hedging activities. During first quarter 2005, the Company recognized approximately $9 million of expense related to amounts excluded from the Company's measurements of hedge effectiveness and $27 million in income related to the ineffectiveness of its hedges. In first quarter 2004, the Company recognized approximately $6 million of expense related to amounts excluded from the Company's measurements of hedge effectiveness and $6 million in income related to the ineffectiveness of its hedges.

The Company's effective tax rate decreased to 33.1 percent in first quarter 2005 from 37.9 percent in first quarter 2004. The lower rate in 2005 reflected a $6 million ($.01 per share, diluted) reduction in income tax expense, attributable to the favorable resolution of an industry-wide issue regarding the tax treatment of certain aircraft engine maintenance costs. The Company currently expects its second quarter 2005 effective rate to approximate 38 percent and its full year 2005 effective rate to be in the 37 to 38 percent range.

Liquidity and Capital Resources

Net cash provided by operating activities was $886 million for the three months ended March 31, 2005, compared to $417 million in the same prior year period. The increase was primarily due to an increase in Accounts payable and accrued liabilities, primarily from $490 million more in counterparty deposits associated with the Company's fuel hedging program. See Item 3, and Notes 5 and 9 to the unaudited condensed consolidated financial statements. Net cash provided by operating activities was $1.6 billion for the 12 months ended March 31, 2005. Cash generated from operating activities for the 12 months ended March 31, 2005, was primarily used to finance capital expenditures.

Cash flows used in investing activities during the three months ended March 31, 2005, totaled $172 million compared to $321 million in 2004. Investing activities in both years consisted primarily of payments for new 737-700 aircraft delivered to the Company and progress payments for future aircraft deliveries. In addition, investing activities now includes changes in the Company's balance of short-term investments, namely auction rate securities, which represents a change in classification from prior periods.


See Note 1 to the condensed consolidated financial statements. Cash flows used in investing activities for the 12 months ended March 31, 2005 totaled $1.6 billion.

Net cash generated from financing activities during the three months ended March 31, 2005, was $146 million compared to $98 million used in financing activities in 2004. The Company generated $300 million from the February 2005 issuance of senior unsecured Notes due 2017. This was partially offset by cash used to redeem the $100 million senior unsecured 8% Notes due March 1, 2005, and to repurchase $55 million of the Company's common stock.

Contractual Obligations and Contingent Liabilities and Commitments

Southwest has contractual obligations and commitments primarily for future purchases of aircraft, payment of debt, and lease arrangements. Following the receipt of 12 new 737-700 aircraft from Boeing in the first three months of 2005, the Company has 22 737-700 aircraft deliveries for the remainder of 2005. Following the first quarter exercise of options to purchase an additional seven aircraft in 2006, the Company has firm commitments for the purchase of 33 new 737-700 aircraft to be delivered in 2006, along with an option for one additional aircraft. The following table details the Company's current (as of March 31, 2005) firm orders, options, and purchase rights through 2012.

                  Current Schedule
                  Firm     Options*
2005**             34         -
2006               33         1
2007               25        29
2008                6        45
2009-2012           -       177
Total              98       252

*    Includes purchase rights
**   Includes 12 aircraft delivered through March 31, 2005

The following table details information on the 424 aircraft in the Company's fleet as of March 31, 2005:

                      Average        Number        Number      Number
737 Type   Seats           Age (Yrs)     of Aircraft     Owned     Leased
-300        137        13.9           194           110          84
-500        122        13.9            25            16           9
-700        137         3.4           205           203           2

TOTALS                  8.8           424           297          95


The Company has the option, which must be exercised two years prior to the contractual delivery date, to substitute -600s or -800s for the -700s. Aggregate funding needed for firm aircraft commitments, as of March 31, 2005, was approximately $1.8 billion, subject to adjustments for inflation, due as follows: $600 million remaining in 2005, $699 million in 2006, $420 million in 2007, and $80 million thereafter.

In January 2004, the Company's Board of Directors authorized the repurchase of up to $300 million of the Company's common stock, utilizing proceeds from the exercise of Employee stock options. Repurchases have been made in accordance with applicable securities laws in the open market or in private transactions from time to time, depending on market conditions. During first quarter 2005, the Company completed this program by repurchasing 3.9 million shares. See Item 2 of Part II of this filing for further information.

The Company has various options available to meet its capital and operating commitments, including cash on hand at March 31, 2005, of $1.9 billion, internally generated funds, and the Company's fully available $575 million revolving credit facility. The Company will also consider various borrowing or leasing options to maximize earnings and supplement cash requirements.

During first quarter 2005, the Company issued $300 million senior unsecured Notes (Notes) due 2017. The Notes bear interest at 5.125 percent, payable semi-annually in arrears, with the first payment due on September 1, 2005. Also during first quarter 2005, the Company redeemed its $100 million 8% senior unsecured notes on the maturity date of March 1, 2005. See Note 8 to the condensed consolidated financial statements.

The Company currently has outstanding shelf registrations for the issuance of up to $350 million in public debt securities and pass through certificates, which it may utilize for aircraft financings or other purposes in the future.

Forward looking statements

Some statements in this Form 10-Q (or otherwise made by the Company or on the Company's behalf from time to time in other reports, filings with the Securities and Exchange Commission, news releases, conferences, World Wide Web postings or otherwise) which are not historical facts may be "forward- looking statements" within the meaning of Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements about Southwest's estimates, expectations, beliefs, intentions, or strategies for the future, and the assumptions underlying these forward-looking statements. Southwest uses the words "anticipates," "believes," "estimates," "expects," "intends," "forecasts," "may," "will," "should," and similar expressions to identify these forward-looking statements. Forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from historical experience or the Company's present expectations. Factors that could cause these differences include, but are not limited to:

- Items directly linked to the September 11, 2001, terrorist attacks, such as the adverse impact of new airline and airport security directives on the


Company's costs and Customer demand for travel, changes in the Transportation Security Administration's scope for managing U.S. airport security, and the possibility of further terrorist attacks or additional incidents that could cause the public to question the safety and/or efficiency of air travel.

- The availability and cost of war-risk and other aviation insurance, including the federal government's provision of third party war-risk coverage to airlines. The government's coverage currently extends to August 31, 2005, and the Company expects it will be extended further to December 31, 2005, by the Department of Transportation. However, there are no assurances that such coverage will be extended beyond August 31, 2005 or December 31, 2005.

- War or other military actions by the U.S. or others.

- Competitive factors, such as fare sales and capacity decisions by the Company and its competitors, changes in competitors' flight schedules, mergers and acquisitions, codesharing programs, and airline bankruptcies.

- General economic conditions, which could adversely affect the demand for travel in general and consumer ticket purchasing habits, as well as decisions by major freight Customers on how they allocate freight deliveries among different types of carriers.

- Factors that could affect the Company's ability to control its costs, such as the results of Employee labor contract negotiations, Employee hiring and retention rates, costs for health care, capacity decisions by the Company and its competitors, unscheduled required aircraft airframe or engine repairs and regulatory requirements, changes in commission policy, availability of capital markets, and future financing decisions made by the Company.

- Factors affecting the Company's fuel expense, including, but not limited to, the largely unpredictable prices of jet fuel, crude oil, heating oil, and unleaded gasoline, the continued effectiveness of the Company's fuel hedges, changes in the Company's overall fuel hedging strategy, and the Company's interpretation and application of the complex requirements of SFAS 133, Accounting for Derivative Instruments and Hedging Activities, as amended.

- Disruptions to operations due to adverse weather conditions and air traffic control-related constraints.

- Internal failures of technology or large-scale external interruptions in technology infrastructure, such as power, telecommunications, or the internet.

- Risks involved with the Company's acquisition of certain assets from ATA Airlines, Inc. (ATA), including the collectibility of loans made to ATA, and the continued success of the Company's codeshare agreement with ATA.

Caution should be taken not to place undue reliance on the Company's forward- looking statements, which represent the Company's views only as of the date


this report is filed. The Company undertakes no obligation to update publicly or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

As discussed in Note 5 to the unaudited condensed consolidated financial statements, the Company utilizes financial derivative instruments to hedge its exposure to material increases in jet fuel prices. During the first three months of 2005, because of the continued upward trend in energy prices, the fair values of the Company's fuel hedge contracts have increased significantly. At March 31, 2005, the estimated gross fair value of outstanding contracts was $1.7 billion, compared to $796 million at December 31, 2004.

Outstanding financial derivative instruments expose the Company to credit loss in the event of nonperformance by the counterparties to the agreements. However, the Company does not expect any of the counterparties to fail to meet their obligations. The credit exposure related to these financial instruments is represented by the fair value of contracts with a positive fair value at the reporting date. To manage credit risk, the Company selects and periodically reviews counterparties based on credit ratings, limits its exposure to a single counterparty, and monitors the market position of the program and its relative market position with each counterparty. At March 31, 2005, the Company had agreements with seven counterparties containing early termination rights and/or bilateral collateral provisions whereby security is required if market risk exposure exceeds a specified threshold amount or credit ratings fall below certain levels. At March 31, 2005, the Company held $820 million in fuel hedge related cash collateral deposits and $150 million in U.S. Treasury Bills, under these bilateral collateral provisions. These collateral deposits serve to decrease, but not totally eliminate, the credit risk associated with the Company's hedging program. The cash deposits, which can have a significant impact on the Company's cash balance and cash flows as of and for a particular operating period, are included in "Accrued liabilities" on the Consolidated Balance Sheet and are included as "Operating cash flows" in the Consolidated Statement of Cash Flows. In accordance with SFAS 140, "Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities", the U.S. Treasury Bills, supplied as non- cash collateral by counterparties, are not reflected on the Company's Consolidated Balance Sheet. See also Note 9 to the unaudited condensed consolidated financial statements.

See Item 7A "Quantitative and Qualitative Disclosures About Market Risk" in the Company's Annual Report on Form 10-K for the year ended December 31, 2004 and Note 5 to the unaudited condensed consolidated financial statements for further information about Market Risk.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures designed to ensure that it is able to collect the information it is required to disclose in the reports it files with the Securities and Exchange Commission (SEC), and to process, summarize and disclose this information within the time periods


specified in the rules of the SEC. Based on an evaluation of the Company's disclosure controls and procedures as of the end of the period covered by this report conducted by the Company's management, with the participation of the Chief Executive and Chief Financial Officers, the Chief Executive and Chief Financial Officers believe that these controls and procedures are effective to ensure that the Company is able to collect, process, and disclose the information it is required to disclose in the reports it files with the SEC within the required time periods.

Internal Control over Financial Reporting. During first quarter 2005, the Company implemented a new fuel inventory management application that improved the efficiency of the Company 's fuel purchasing, inventory, and payment processes. As with any new information technology application the Company implements, this application, along with the internal controls over financial reporting included in this process, were appropriately tested for effectiveness prior to implementation. The Company expects this new application to improve its internal controls over financial reporting for its fuel management process.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

The Company is subject to various legal proceedings and claims arising in the ordinary course of business, including, but not limited to, examinations by the Internal Revenue Service (IRS). The IRS regularly examines the Company's federal income tax returns and, in the course thereof, proposes adjustments to the Company's federal income tax liability reported on such returns. It is the Company's practice to vigorously contest those proposed adjustments it deems lacking of merit.

The Company's management does not expect that the outcome in any of its currently ongoing legal proceedings or the outcome of any proposed adjustments presented to date by the IRS, individually or collectively, will have a material adverse effect on the Company's financial condition, results of operations or cash flow.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(c)

Issuer Purchases of Equity Securities (1)

                  (a)            (b)              (c)                (d)
                                            Total number of    Maximum dollar
                                           shares purchased    value that may
             Total number      Average  as part of publicly  yet be purchased
               of shares     price paid     announced plans   under the plans
   Period      purchased      per share       or programs       or programs
January 1,
 2005 through
  January 31,
   2005        2,400,000       $14.16          2,400,000         $20,370,022

February 1,
 2005 through
  February 28,
   2005        1,458,500       $14.38          1,458,500        $          -
March 1,
 2005 through
  March 31,
   2005                -       $    -                  -        $          -

     Total (2) 3,858,500                       3,858,500

(1) On January 22, 2004, the Company announced a program for the repurchase of up to $300 million of the Company's common stock, utilizing present and anticipated proceeds from the exercise of Employee stock options. Repurchases were made in accordance with applicable securities laws in the open market or in private transactions from time to time, depending on market conditions. The program was completed during first quarter 2005.

(2) All shares were purchased pursuant to the publicly announced program.

Item 3. Defaults upon Senior Securities

None

Item 4. Submission of Matters to a Vote of Security Holders

None

Item 5. Other Information

None

Item 6. Exhibits

a) Exhibits

10.1 Supplemental Agreements Nos. 42, 43, and 44 to Purchase Agreement No. 1810, dated January 19, 1994 between The Boeing Company and Southwest. Pursuant to 17 CFR 240.24b-2, confidential information has been omitted and has been filed separately with the Securities and Exchange Commission pursuant to a Confidential Treatment Application filed with the Commission.
31.1 Rule 13a-14(a) Certification of Chief Executive Officer
31.2 Rule 13a-14(a) Certification of Chief Financial Officer
32.1 Section 1350 Certifications of Chief Executive Officer and Chief Financial Officer


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

SOUTHWEST AIRLINES CO.

April 15, 2005                                    By /s/  Laura Wright

                                                     Laura Wright
                                                     Chief Financial Officer
                                                     (Principal Financial and
                                                      Accounting Officer)


EXHIBIT INDEX

Exhibit No.                        Description

Exhibit 10.1      -     Supplemental Agreements Nos. 42, 43, and 44 to
                        Purchase Agreement No. 1810, dated January 19, 1994
                        between The Boeing Company and Southwest.  Pursuant
                        to 17 CFR 240.24b-2, confidential information has
                        been omitted and has been filed separately with the
                        Securities and Exchange Commission pursuant to a
                        Confidential Treatment Application filed with the
                        Commission.

Exhibit 31.1      -     Rule 13a-14(a) Certification of Chief Executive
                        Officer

Exhibit 31.2      -     Rule 13a-14(a) Certification of Chief Financial
                        Officer

Exhibit 32.1      -     Section 1350 Certifications of Chief Executive
                        Officer and Chief Financial Officer




Exhibit 10.1

Supplemental Agreement No. 42

to

Purchase Agreement No. 1810

between

THE BOEING COMPANY

and

SOUTHWEST AIRLINES CO.

Relating to Boeing Model 737-7H4 Aircraft

THIS SUPPLEMENTAL AGREEMENT, entered into as of January 31, 2004, by and between THE BOEING COMPANY, a Delaware corporation with principal offices in Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas corporation with principal offices in Dallas, Texas (Buyer);

WHEREAS, the parties hereto entered into Purchase Agreement No. 1810 dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the Agreement) and;

WHEREAS, Buyer has agreed to exercise two (2) April 2006 Block U-W Option Aircraft and two (2) May 2006 Block U-W Option Aircraft (as Block T-W Aircraft) and;

WHEREAS, Buyer and Boeing agreed to additional business considerations applicable to Aircraft delivering January 2006 and on and;

WHEREAS, Buyer and Boeing agreed to business considerations associated with certain production Master Changes and;

NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties agree to amend the Agreement as follows:

***Pursuant to 17 CFR 240.24b-2, confidential information has been omitted and has been filed separately with the Securities and Exchange Commission pursuant to a Confidential Treatment Application filed with the Commission.

1. The Table of Contents of the Agreement is deleted in its entirety and a new Table of Contents is attached hereto and incorporated into the Agreement by this reference.

P.A. No. 1810 SA-41-1
K/SWA


2. Table 1 is deleted in its entirety and replaced by a new Table 1 which is attached hereto and is incorporated into the Agreement by this reference.

3. Table 2 is deleted in its entirety and replaced by a new Table 2 which is attached hereto and is incorporated into the Agreement by this reference.

NOTE - Buyer now has forty-nine (49) 'banked' Rollover Option Aircraft as
a result of the option exercises covered by Supplemental Agreement No. 21, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41 and 42 that may be converted to Option Aircraft at a future date subject to the terms of Letter Agreement No. 6-1162-RLL-933R19.

4. Letter Agreement No. 6-1162-JMG-669R2 entitled "Special Matters" is deleted in its entirety and replaced by Agreement No. 6-1162-JMG-669R3 entitled "Special Matters" attached hereto and is hereby incorporated into the Agreement by this reference.

5. All references in the Letter Agreements associated with Purchase Agreement No. 1810 shall be deemed to refer to the purchase by Buyer of two hundred eighty-five (285) Model 737-7H4 Aircraft, thirty-eight (38) Model 737-7H4 Option Aircraft and two hundred seventeen (217) Model 737-7H4 Rollover Option Aircraft, to the extent such reference is not specifically addressed herein.

6. The Advance Payments due upon signing assuming execution of this Supplemental Agreement on or before January 31, 2005 are:

*** for two (2) April 2006 aircraft
*** for two (2) May 2006 aircraft.

Buyer will pay the *** directly to Boeing on or before Monday, January 31, 2005.

The Agreement will be deemed to be supplemented to the extent herein provided and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY                  SOUTHWEST AIRLINES CO.



By: /s/ Nobuko Wiles                By:/s/ Laura Wright

Its:  Attorney-In-Fact              Its:SVP Finance & CFO

P.A. No. 1810 SA-41-2
K/SWA


                               TABLE OF CONTENTS


                                                         Page            SA
                                                       Number        Number
ARTICLES


1.    Subject Matter of Sale                              1-1         SA-13

2.    Delivery, Title and Risk of Loss                    2-1         SA-28

3.    Price of Aircraft                                   3-1         SA-28

4.    Taxes                                               4-1

5.    Payment                                             5-1

6.    Excusable Delay                                     6-1

7.    Changes to the Detail Specification                 7-1          SA-1

8. Federal Aviation Requirements and
      Certificates and Export License                     8-1

9. Representatives, Inspection,
      Flights and Test Data                               9-1

10.   Assignment, Resale or Lease                        10-1

11.   Termination for Certain Events                     11-1

12.   Product Assurance; Disclaimer and
      Release; Exclusion of Liabilities;
      Customer Support; Indemnification
      and Insurance                                      12-1

13.   Buyer Furnished Equipment and
      Spare Parts                                        13-1

14.   Contractual Notices and Requests                   14-1

15.   Miscellaneous                                      15-1

P.A. No. 1810 i
K/SWA SA-42


                              TABLE OF CONTENTS CON'T


                                                                         SA
                                                                     Number
TABLE

1.    Aircraft Information Table                                      SA-42

2.    Option Aircraft Information Table                               SA-42

EXHIBITS


A     Aircraft Configuration                                          SA-36

B     Product Assurance Document                                       SA-1

C     Customer Support Document

D     Price Adjustments Due to
      Economic Fluctuations - Aircraft                                SA-13

E     Buyer Furnished Equipment
      Provisions Document

F     Defined Terms Document





LETTER AGREEMENTS


1810-1      Waiver of Aircraft Demonstration Flight

P.A. No. 1810 ii
K/SWA SA-42


                          TABLE OF CONTENTS CON'T

                                                                         SA
                                                                     Number
RESTRICTED LETTER AGREEMENTS


6-1162-RLL-932R2        Promotional Support                                 SA-13

6-1162-RLL-933R19       Option Aircraft                                     SA-28

6-1162-RLL-934R3        Disclosure of Confidential                          SA-14
                  Information

6-1162-RLL-935R1  Performance Guarantees                               SA-1

6-1162-NIW-890    ***                                                 SA-39



6-1162-RLL-936R4  Certain Contractual Matters                          SA-4

6-1162-RLL-937    Alternate Advance Payment Schedule

6-1162-RLL-938    ***

6-1162-RLL-939R1  Certification Flight Test Aircraft                   SA-1

6-1162-RLL-940R1  Training Matters                                     SA-1

6-1162-RLL-941R2  Other Matters                                       SA-13

6-1162-RLL-942    Open Configuration Matters

6-1162-RLL-943R1  Substitution Rights                                  SA-6

6-1162-RLL-944    Airframe Maintenance Material Cost
                  Protection Program

6-1162-RLL-945    Comparison of 737-7H4 and 737-3H4
                  Block Fuel Burn

6-1162-RLL-1855R3 Additional Contractual Matters                       SA-4

6-1162-RLL-1856   ***                                                  SA-1

6-1162-RLL-1857   Service Ready Validation Program                     SA-1
                  Field Test

6-1162-RLL-1858R1 Escalation Matters                                   SA-4

P.A. No. 1810 iii
K/SWA SA-42


                          TABLE OF CONTENTS CON'T


                                                                         SA
                                                                     Number
RESTRICTED LETTER AGREEMENTS


6-1162-RLL-2036   Amortization of Costs for
                  Customer Unique Changes                              SA-1

6-1162-RLL-2037   Reconciliation of the Aircraft                       SA-1
                  Basic Price

6-1162-RLL-2073   Maintenance Training Matters                         SA-1

6-1162-KJJ-054    Business Matters                                    SA-13

6-1162-KJJ-055R1  Structural Matters                                  SA-25

6-1162-KJJ-056    Noise and Emission Matters                          SA-13

6-1162-KJJ-057    Product Development Matters                         SA-13

6-1162-KJJ-058    Additional Substitution Rights                      SA-13

6-1162-KJJ-150    Flight Control Computer & Mode                      SA-14
                  Control Panel Spares Matter

6-1162-MSA-185R3  Delivery Change Contractual                         SA-21
                  Matters

6-1162-JMG-669R3        Special Matters                                     SA-42

6-1162-JMG-747R1  ***                                                 SA-36

6-1162-CHL-217    Rescheduled Flight Test Aircraft                    SA-32

66-1162-NIW-606R1       ***                                                 SA-36


6-1162-NIW-640    ***                                                 SA-35


6-1162-NIW-889    Warranty - Exterior Color Schemes                   SA-39
                  and Markings for YA143 and on

P.A. No. 1810 iv
K/SWA SA-42


                                    Table 1 to
                           Purchase Agreement No. 1810
                            Aircraft Information Table





                    Base Aircraft    Special     Aircraft Basic    Base Year
                        Price        Features        Price         Dollars
Block A, B, C,
D & E Aircraft           ***           ***            ***          July 1992
Block F & G Aircraft     ***           ***            ***          July 1992
Block H Aircraft         ***           ***            ***          July 1992
Block I Aircraft         ***           ***            ***          July 1992
Block J Aircraft         ***           ***            ***          July 1992
Block K Aircraft         ***           ***            ***          July 1992
Block K-W Aircraft       ***           ***            ***          July 1992
Block L Aircraft         ***           ***            ***          July 1992
Block T Aircraft         ***           ***            ***          July 1999
Block T-W Aircraft       ***           ***            ***          July 1999

Block K-W Aircraft: Block K airplanes with production winglets installation Block T-W Aircraft: Block T airplanes with production winglets installation

SWA Page 1 SA 42


                                 Table 1 to
                         Purchase Agreement No. 1810
                          Aircraft Information Table



                                                       Escalation Estimate
Delivery           Number of          Aircraft          Adv Payment Base
  Date             Aircraft            Block              Price Per A/P
Dec-2000              2                  E                    ***
Jan-2001              1                  E                    ***
Feb-2001              1                  E                    ***
Mar-2001              2                  E                    ***
Jun-2001              3                  E                    ***
Sep-2001              3                  E                    ***
Oct-1998              1                  F                    ***
Nov-1998              2                  F                    ***
Dec-1998              2                  F                    ***
Mar-1999              2                  G                    ***
Jun-1999              2                  H                    ***
Jul-1999              1                  H                    ***
Aug-1999              1                  H                    ***
Sep-1999              2                  H                    ***
Oct-1999              1                  H                    ***
Mar-2000              1                  H                    ***
Apr-2000              2                  H                    ***
Sep-2000              1                  H                    ***
Oct-2000              2                  H                    ***
Mar-2001              2                  H                    ***
Apr-2001              1                  H                    ***
Oct-2001              3                  H                    ***
Nov-2001              2                  I                    ***
Dec-2001              1                  I                    ***
Jan-2002              1                  I                    ***
Mar-2002              4                  I                    ***
Apr-2002              2                  I                    ***
Dec-2002              2                  I                    ***
May-2003              1                  I                    ***
Jun-2003              2                  I                    ***
Jul-2003              1                  I                    ***
Aug-2003              1                  I                    ***
Sep-2003              3                  I                    ***
Nov-2002              1                  J                    ***
Dec-2002              1                  J                    ***
Nov-2003              2                  J                    ***
Dec-2003              2                  J                    ***
Mar-2004              1                  J                    ***
Mar-2004              1                  K                    ***
Apr-2004              3                  K                    ***
May-2004              1                  K                    ***
Jun-2004              2                  K                    ***
Jul-2004              2                  K                    ***
SWA                                Page 2                          SA 42

Sep-2004              1                  K-W                  ***
Oct-2004              4                  K-W                  ***
Oct-1999              1                  L                    ***
Nov-1999              2                  L                    ***
Dec-1999              1                  L                    ***
Jun-2000              3                  L                    ***
Jul-2000              3                  L                    ***
Sep-2000              1                  L                    ***
Oct-2000              1                  L                    ***
Nov-2000              4                  L                    ***
Dec-2000              1                  L                    ***
Jan-2001              1                  L                    ***
Feb-2001              1                  L                    ***
Jul-2001              1                  L                    ***
Sep-2001              1                  L                    ***
Oct-2001              1                  L                    ***
Mar-2003              2                  L                    ***
Jul-2003              1                  L                    ***
Aug-2003              2                  L                    ***
Nov-2001              1                  T                    ***
Feb-2002              1                  T                    ***
Jan-2004              2                  T                    ***
Feb-2004              1                  T                    ***
Apr-2004              3                  T                    ***
May-2004              1                  T                    ***
Jun-2004              6                  T                    ***
Jul-2004              2                  T                    ***
Aug-2004              6                  T-W                  ***
Sep-2004              4                  T-W                  ***
Oct-2004              0                  T-W                  ***
Nov-2004              3                  T-W                  ***
Dec-2004              3                  T-W                  ***
Jan-2005              5                  T-W                  ***
Feb-2005              3                  T-W                  ***
Mar-2005              4                  T-W                  ***
Apr-2005              4                  T-W                  ***
May-2005              2                  T-W                  ***
Jun-2005              4                  T-W                  ***
Jul-2005              2                  T-W                  ***
Aug-2005              2                  T-W                  ***
Sep-2005              3                  T-W                  ***
Oct-2005              2                  T-W                  ***
Nov-2005              2                  T-W                  ***
Dec-2005              1                  T-W                  ***
Jan-2006              1                  T-W                  ***
Feb-2006              4                  T-W                  ***
Mar-2006              3                  T-W                  ***
Apr-2006              2                  T-W                  ***
May-2006              5                  T-W                  ***
Jun-2006              4                  T-W                  ***
Jul-2006              1                  T-W                  ***
Aug-2006              3                  T-W                  ***
Sep-2006              3                  T-W                  ***
SWA                                Page 3                          SA 42

Nov-2006              2                  T-W                  ***
Dec-2006              2                  T-W                  ***
Jan-2007              2                  T-W                  ***
Feb-2007              3                  T-W                  ***
Mar-2007              2                  T-W                  ***
Apr-2007              2                  T-W                  ***
May-2007              2                  T-W                  ***
Jun-2007              2                  T-W                  ***
Jul-2007              2                  T-W                  ***
Aug-2007              2                  T-W                  ***
Sep-2007              2                  T-W                  ***
Oct-2007              2                  T-W                  ***
Nov-2007              2                  T-W                  ***
Dec-2007              2                  T-W                  ***
Jan-2008              1                  T-W                  ***
Feb-2008              1                  T-W                  ***
Mar-2008              1                  T-W                  ***
Apr-2008              1                  T-W                  ***
May-2008              1                  T-W                  ***
Jun-2008              1                  T-W                  ***

SWA Page 4 SA 42


                      Table 2 to Purchase Agreement No. 1810
                     (Letter Agreement No. 6-1162-RLL-933R19)
                        Option Aircraft Information Table






Price Description of Option Aircraft:
                       Base Aircraft    Special     Aircraft Basic    Base Year
                          Price         Features        Price          Dollars
Block U Option Aircraft    ***            ***            ***          July 1999
(without Winglets)
Block U-W Option           ***            ***            ***          July 1999
Aircraft
(with Winglets)

Delivery of Rollover Option Aircraft:


Year of        Number of        Option Aircraft Block
Delivery        Option
               Aircraft

2007          Twenty (20)          Q
2008          Twenty (20)          R
2009          Six (6)              S
2009-2012     One Hundred          V
              Seventy-One
              (171)

Remaining Option
Aircraft:                                    38


                      Table 2 to Purchase Agreement No. 1810
                     (Letter Agreement No. 6-1162-RLL-933R19)
                        Option Aircraft Information Table

Aircraft     Number of       Option         Adv Payment
                                               Base
Delivery      Option         Aircraft        Price Per
Mo. & Yr.    Aircraft         Block       Option Aircraft     Option Exercise
Jun-2006        1              U-W             ***            February 1, 2005
Jul-2006        2              U-W             ***            March 1, 2005
Oct-2006        1              U-W             ***            June 1, 2005
Apr-2007        1              U-W             ***            December 1, 2005
May-2007        1              U-W             ***            January 1, 2006
Jun-2007        1              U-W             ***            February 1, 2006
Jul-2007        1              U-W             ***            March 1, 2006
Aug-2007        1              U-W             ***            April 1, 2006
Sep-2007        1              U-W             ***            May 1, 2006
Oct-2007        1              U-W             ***            June 1, 2006
Nov-2007        1              U-W             ***            July 1, 2006
Dec-2007        1              U-W             ***            August 1, 2006
Jan-2008        2              U-W             ***            September 1, 2006
Feb-2008        3              U-W             ***            October 1, 2006
Mar-2008        2              U-W             ***            November 1, 2006
Apr-2008        2              U-W             ***            December 1, 2006
May-2008        2              U-W             ***            January 1, 2007
Jun-2008        2              U-W             ***            February 1, 2007
Jul-2008        2              U-W             ***            March 1, 2007
Aug-2008        2              U-W             ***            April 1, 2007
Sep-2008        2              U-W             ***            May 1, 2007
Oct-2008        2              U-W             ***            June 1, 2007
Nov-2008        2              U-W             ***            July 1, 2007
Dec-2008        2              U-W             ***            August 1, 2007


6-1162-JMG-669R3


Southwest Airlines Co.
P.O. Box 36611 - Love Field
Dallas, Texas  75235

Subject: Special Matters

This Letter Agreement amends Purchase Agreement No. 1810 dated as of January 19, 1994 (the Agreement) between The Boeing Company (Boeing) and Southwest Airlines Co. (Buyer) relating to Model 737 aircraft:

1) ***
2) ***

All terms used and not defined herein will have the same meaning as in the Agreement.

1. ***

2. ***

3. ***

4. ***

5. ***.

6. ***

7. *** P.A. No. 1810 SA-42
K/SWA


Southwest Airlines Co.
6-1162-JMG-669R3

Page 2

8. ***

9. ***

10. Confidential Treatment.

Buyer understands that certain commercial and financial information contained in this Letter Agreement including any attachments hereto is considered by Boeing as confidential. Buyer agrees that it will treat this Letter Agreement and the information contained herein as confidential and will not, without the prior written consent of Boeing, disclose this Letter Agreement or any information contained herein to any other person or entity except as provided in Letter Agreement No. 6-1162-RLL-934, as amended. Very truly yours,

THE BOEING COMPANY

By:/s/ Nobuko Wiles

Its Attorney-In-Fact


ACCEPTED AND AGREED TO this

date:January 31, 2005

SOUTHWEST AIRLINES CO.

By/s/ Laura Wright

Its SVP and CFO

P.A. No. 1810
K/SWA                                                                SA-42
Southwest Airlines Co.
Attachment A to 6-1162-JMG-669R3

                                   ***

P.A. No. 1810
K/SWA SA-42


Supplemental Agreement No. 43

            to

Purchase Agreement No. 1810

          between

    THE BOEING COMPANY

            and

   SOUTHWEST AIRLINES CO.

Relating to Boeing Model 737-7H4 Aircraft

THIS SUPPLEMENTAL AGREEMENT, entered into as of February 28, 2005, by and between THE BOEING COMPANY, a Delaware corporation with principal offices in Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas corporation with principal offices in Dallas, Texas (Buyer);

WHEREAS, the parties hereto entered into Purchase Agreement No. 1810 dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the Agreement) and;

WHEREAS, Buyer has agreed to exercise one (1) June 2006 Block U-W Option Aircraft (as Block T-W Aircraft) and;

WHEREAS, Buyer and Boeing agreed to business considerations associated with certain Out of Cycle engines and;

WHEREAS, Buyer and Boeing agreed to record the previously agreed upon business considerations to address Buyer's concerns relative to certain Airworthiness Directives and;

NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties agree to amend the Agreement as follows:

1. The Table of Contents of the Agreement is deleted in its entirety and a new Table of Contents is attached hereto and incorporated into the Agreement by this reference.

***Pursuant to 17 CFR 240.24b-2, confidential information has been omitted and has been filed separately with the Securities and Exchange Commission pursuant to a Confidential Treatment Application filed with the Commission.

2. Table 1 is deleted in its entirety and replaced by a new Table 1 which is attached hereto and is incorporated into the Agreement by this reference.

3. Table 2 is deleted in its entirety and replaced by a new Table 2 which is attached hereto and is incorporated into the Agreement by this reference. P.A. No. 1810 SA-43-1
K/SWA


NOTE - Buyer now has fifty (50) 'banked' Rollover Option Aircraft as a
result of the option exercises covered by Supplemental Agreement No. 21, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42 and 43 that may be converted to Option Aircraft at a future date subject to the terms of Letter Agreement No. 6-1162-RLL-933R19.

4. Letter Agreement No. 6-1162-JMG-669R3 entitled "Special Matters" is deleted in its entirety and replaced by Agreement No. 6-1162-JMG-669R4 entitled "Special Matters" attached hereto and is hereby incorporated into the Agreement by this reference.

5. Letter Agreement No. 6-1162-NIW-1142 entitled "Certain Twenty-six (26) Out of Cycle Engines" attached hereto is hereby incorporated into the Agreement by this reference

6. All references in the Letter Agreements associated with Purchase Agreement No. 1810 shall be deemed to refer to the purchase by Buyer of two hundred eighty-six (286) Model 737-7H4 Aircraft, thirty-seven (37) Model 737 -7H4 Option Aircraft and two hundred seventeen (217) Model 737-7H4 Rollover Option Aircraft, to the extent such reference is not specifically addressed herein.

7. The Advance Payments due upon signing assuming execution of this Supplemental Agreement on or before February 28, 2005 are:

***for one (1) June 2006 aircraft

Buyer will pay the *** directly to Boeing on or before Monday, February 28, 2005.

The Agreement will be deemed to be supplemented to the extent herein provided and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY SOUTHWEST AIRLINES CO.

By: /s/ Nobuko Wiles                By:/s/ Laura Wright

Its:    Attorney-In-Fact            Its:SVP and CFO

P.A. No. 1810 SA-43-1
K/SWA


                                 TABLE OF CONTENTS


                                                           Page          SA
                                                         Number      Number

ARTICLES

1.    Subject Matter of Sale                               1-1        SA-13

2.    Delivery, Title and Risk
      of Loss                                              2-1        SA-28

3.    Price of Aircraft                                    3-1        SA-28

4.    Taxes                                                4-1

5.    Payment                                              5-1

6.    Excusable Delay                                      6-1

7.    Changes to the Detail
      Specification                                        7-1         SA-1

8.    Federal Aviation Requirements and
      Certificates and Export License                      8-1

9.    Representatives, Inspection,
      Flights and Test Data                                9-1

10.   Assignment, Resale or Lease                         10-1

11.   Termination for Certain Events                      11-1

12.   Product Assurance; Disclaimer and
      Release; Exclusion of Liabilities;
      Customer Support; Indemnification
      and Insurance                                       12-1

13.   Buyer Furnished Equipment and
      Spare Parts                                         13-1

14.   Contractual Notices and Requests                    14-1

15.   Miscellaneous                                       15-1

P.A. No. 1810 i
K/SWA SA-43


                           TABLE OF CONTENTS CON'T


                                                                         SA
                                                                     Number
TABLE

1.    Aircraft Information Table                                      SA-43

2.    Option Aircraft Information Table                               SA-43

EXHIBITS


A     Aircraft Configuration                                          SA-36

B     Product Assurance Document                                       SA-1

C     Customer Support Document

D     Price Adjustments Due to
      Economic Fluctuations - Aircraft                                SA-13

E     Buyer Furnished Equipment
      Provisions Document

F     Defined Terms Document





LETTER AGREEMENTS


1810-1      Waiver of Aircraft Demonstration Flight

P.A. No. 1810 ii
K/SWA SA-43


                         TABLE OF CONTENTS CON'T

                                                                         SA
                                                                     Number
RESTRICTED LETTER AGREEMENTS


6-1162-RLL-932R2  Promotional Support                                 SA-13

6-1162-RLL-933R19 Option Aircraft                                     SA-28

6-1162-RLL-934R3  Disclosure of Confidential                          SA-14
                  Information

6-1162-RLL-935R1  Performance Guarantees                               SA-1

6-1162-NIW-890    ***                                                 SA-39


6-1162-RLL-936R4  Certain Contractual Matters                          SA-4

6-1162-RLL-937    Alternate Advance Payment Schedule

6-1162-RLL-938    ***

6-1162-RLL-939R1  Certification Flight Test Aircraft                   SA-1

6-1162-RLL-940R1  Training Matters                                     SA-1

6-1162-RLL-941R2  Other Matters                                       SA-13

6-1162-RLL-942    Open Configuration Matters

6-1162-RLL-943R1  Substitution Rights                                  SA-6

6-1162-RLL-944  Airframe Maintenance Material Cost
                  Protection Program

6-1162-RLL-945    Comparison of 737-7H4 and 737-3H4
                  Block Fuel Burn

6-1162-RLL-1855R3 Additional Contractual Matters                       SA-4

6-1162-RLL-1856   ***                                                  SA-1

6-1162-RLL-1857   Service Ready Validation Program                     SA-1
                  Field Test

6-1162-RLL-1858R1 Escalation Matters                                   SA-4

P.A. No. 1810 iii
K/SWA SA-43


                           TABLE OF CONTENTS CON'T


                                                                         SA
                                                                     Number
RESTRICTED LETTER AGREEMENTS


6-1162-RLL-2036   Amortization of Costs for
                  Customer Unique Changes                              SA-1

6-1162-RLL-2037   Reconciliation of the Aircraft                       SA-1
                  Basic Price

6-1162-RLL-2073   Maintenance Training Matters                         SA-1

6-1162-KJJ-054    Business Matters                                    SA-13

6-1162-KJJ-055R1  Structural Matters                                  SA-25

6-1162-KJJ-056    Noise and Emission Matters                          SA-13

6-1162-KJJ-057    Product Development Matters                         SA-13

6-1162-KJJ-058    Additional Substitution Rights                      SA-13

6-1162-KJJ-150    Flight Control Computer & Mode                      SA-14
                  Control Panel Spares Matter

6-1162-MSA-185R3  Delivery Change Contractual                         SA-21
                  Matters

6-1162-JMG-669R4  Special Matters                                     SA-43

6-1162-JMG-747R1  ***                                                 SA-36

6-1162-CHL-217    Rescheduled Flight Test Aircraft                    SA-32

6-1162-NIW-606R1  ***                                                 SA-36

6-1162-NIW-640    ***                                                 SA-35


6-1162-NIW-889    Warranty - Exterior Color Schemes                   SA-39
                  and Markings for YA143 and on

6-1162-NIW-1142   ***                                                 SA-43

P.A. No. 1810 iv
K/SWA SA-43


                                     Table 1 to
                             Purchase Agreement No. 1810
                              Aircraft Information Table


                  Base Aircraft     Special      Aircraft Basic    Base Year
                     Price          Features         Price          Dollars
Block A, B, C,
D & E Aircraft        ***             ***             ***           July 1992
Block F & G Aircraft  ***             ***             ***           July 1992
Block H Aircraft      ***             ***             ***           July 1992
Block I Aircraft      ***             ***             ***           July 1992
Block J Aircraft      ***             ***             ***           July 1992
Block K Aircraft      ***             ***             ***           July 1992
Block K-W Aircraft    ***             ***             ***           July 1992
Block L Aircraft      ***             ***             ***           July 1992
Block T Aircraft      ***             ***             ***           July 1999
Block T-W Aircraft    ***             ***             ***           July 1999


Block K-W Aircraft: Block K airplanes with production winglets installation
Block T-W Aircraft: Block T airplanes with production winglets installation


                                  Table 1 to
                           Purchase Agreement No. 1810
                            Aircraft Information Table


                                                        Escalation Estimate
Delivery        Number of            Aircraft            Adv Payment Base
  Date          Aircraft              Block               Price Per A/P
Dec-2000           2                    E                      ***
Jan-2001           1                    E                      ***
Feb-2001           1                    E                      ***
Mar-2001           2                    E                      ***
Jun-2001           3                    E                      ***
Sep-2001           3                    E                      ***
Oct-1998           1                    F                      ***
Nov-1998           2                    F                      ***
Dec-1998           2                    F                      ***
Mar-1999           2                    G                      ***
Jun-1999           2                    H                      ***
Jul-1999           1                    H                      ***
Aug-1999           1                    H                      ***
Sep-1999           2                    H                      ***
Oct-1999           1                    H                      ***
Mar-2000           1                    H                      ***
Apr-2000           2                    H                      ***
Sep-2000           1                    H                      ***
Oct-2000           2                    H                      ***
Mar-2001           2                    H                      ***
Apr-2001           1                    H                      ***
Oct-2001           3                    H                      ***
Nov-2001           2                    I                      ***
Dec-2001           1                    I                      ***
Jan-2002           1                    I                      ***
Mar-2002           4                    I                      ***
Apr-2002           2                    I                      ***
Dec-2002           2                    I                      ***
May-2003           1                    I                      ***
Jun-2003           2                    I                      ***
Jul-2003           1                    I                      ***
Aug-2003           1                    I                      ***
Sep-2003           3                    I                      ***
Nov-2002           1                    J                      ***
Dec-2002           1                    J                      ***
Nov-2003           2                    J                      ***
Dec-2003           2                    J                      ***
Mar-2004           1                    J                      ***
Mar-2004           1                    K                      ***
Apr-2004           3                    K                      ***
May-2004           1                    K                      ***
Jun-2004           2                    K                      ***
Jul-2004           2                    K                      ***
Sep-2004           1                    K-W                    ***
Oct-2004           4                    K-W                    ***

Oct-1999           1                    L                      ***
Nov-1999           2                    L                      ***
Dec-1999           1                    L                      ***
Jun-2000           3                    L                      ***
Jul-2000           3                    L                      ***
Sep-2000           1                    L                      ***
Oct-2000           1                    L                      ***
Nov-2000           4                    L                      ***
Dec-2000           1                    L                      ***
Jan-2001           1                    L                      ***
Feb-2001           1                    L                      ***
Jul-2001           1                    L                      ***
Sep-2001           1                    L                      ***
Oct-2001           1                    L                      ***
Mar-2003           2                    L                      ***
Jul-2003           1                    L                      ***
Aug-2003           2                    L                      ***
Nov-2001           1                    T                      ***
Feb-2002           1                    T                      ***
Jan-2004           2                    T                      ***
Feb-2004           1                    T                      ***
Apr-2004           3                    T                      ***
May-2004           1                    T                      ***
Jun-2004           6                    T                      ***
Jul-2004           2                    T                      ***
Aug-2004           6                    T-W                    ***
Sep-2004           4                    T-W                    ***
Oct-2004           0                    T-W                    ***
Nov-2004           3                    T-W                    ***
Dec-2004           3                    T-W                    ***
Jan-2005           5                    T-W                    ***
Feb-2005           3                    T-W                    ***
Mar-2005           4                    T-W                    ***
Apr-2005           4                    T-W                    ***
May-2005           2                    T-W                    ***
Jun-2005           4                    T-W                    ***
Jul-2005           2                    T-W                    ***
Aug-2005           2                    T-W                    ***
Sep-2005           3                    T-W                    ***
Oct-2005           2                    T-W                    ***
Nov-2005           2                    T-W                    ***
Dec-2005           1                    T-W                    ***
Jan-2006           1                    T-W                    ***
Feb-2006           4                    T-W                    ***
Mar-2006           3                    T-W                    ***
Apr-2006           2                    T-W                    ***
May-2006           5                    T-W                    ***
Jun-2006           5                    T-W                    ***
Jul-2006           1                    T-W                    ***
Aug-2006           3                    T-W                    ***
Sep-2006           3                    T-W                    ***
Nov-2006           2                    T-W                    ***
Dec-2006           2                    T-W                    ***
Jan-2007           2                    T-W                    ***
Feb-2007           3                    T-W                    ***
Mar-2007           2                    T-W                    ***

Apr-2007           2                    T-W                    ***
May-2007           2                    T-W                    ***
Jun-2007           2                    T-W                    ***
Jul-2007           2                    T-W                    ***
Aug-2007           2                    T-W                    ***
Sep-2007           2                    T-W                    ***
Oct-2007           2                    T-W                    ***
Nov-2007           2                    T-W                    ***
Dec-2007           2                    T-W                    ***
Jan-2008           1                    T-W                    ***
Feb-2008           1                    T-W                    ***
Mar-2008           1                    T-W                    ***
Apr-2008           1                    T-W                    ***
May-2008           1                    T-W                    ***
Jun-2008           1                    T-W                    ***


                      Table 2 to Purchase Agreement No. 1810
                     (Letter Agreement No. 6-1162-RLL-933R19)
                        Option Aircraft Information Table



Price Description of Option Aircraft:

                      Base Aircraft     Special     Aircraft Basic   Base Year
                          Price         Features         Price        Dollars
Block U Option             ***            ***             ***         July 1999
Aircraft
(without Winglets)
Block U-W Option           ***            ***             ***         July 1999
Aircraft
(with Winglets)

Delivery of Rollover Option Aircraft:

Year of         Number of       Option Aircraft Block
Delivery         Option
                Aircraft
2007           Twenty (20)          Q
2008           Twenty (20)          R
2009           Six (6)              S
2009-          One Hundred          V
2012           Seventy-One
               (171)

Remaining Option
Aircraft:                                    37


                    Table 2 to Purchase Agreement No. 1810
                   (Letter Agreement No. 6-1162-RLL-933R19)
                       Option Aircraft Information Table

Aircraft        Number of      Option        Adv Payment
                                                Base
Delivery         Option        Aircraft       Price Per
Mo. & Yr.       Aircraft        Block      Option Aircraft   Option Exercise
Jul-2006            2            U-W            ***           March 1, 2005
Oct-2006            1            U-W            ***           June 1, 2005
Apr-2007            1            U-W            ***           December 1, 2005
May-2007            1            U-W            ***           January 1, 2006
Jun-2007            1            U-W            ***           February 1, 2006
Jul-2007            1            U-W            ***           March 1, 2006
Aug-2007            1            U-W            ***           April 1, 2006
Sep-2007            1            U-W            ***           May 1, 2006
Oct-2007            1            U-W            ***           June 1, 2006
Nov-2007            1            U-W            ***           July 1, 2006
Dec-2007            1            U-W            ***           August 1, 2006
Jan-2008            2            U-W            ***           September 1, 2006
Feb-2008            3            U-W            ***           October 1, 2006
Mar-2008            2            U-W            ***           November 1, 2006
Apr-2008            2            U-W            ***           December 1, 2006
May-2008            2            U-W            ***           January 1, 2007
Jun-2008            2            U-W            ***           February 1, 2007
Jul-2008            2            U-W            ***           March 1, 2007
Aug-2008            2            U-W            ***           April 1, 2007
Sep-2008            2            U-W            ***           May 1, 2007
Oct-2008            2            U-W            ***           June 1, 2007
Nov-2008            2            U-W            ***           July 1, 2007
Dec-2008            2            U-W            ***           August 1, 2007


6-1162-JMG-669R4


Southwest Airlines Co.
P.O. Box 36611 - Love Field
Dallas, Texas  75235

Subject: Special Matters

This Letter Agreement amends Purchase Agreement No. 1810 dated as of January 19, 1994 (the Agreement) between The Boeing Company (Boeing) and Southwest Airlines Co. (Buyer) relating to Model 737 aircraft:

1) ***
2) ***

All terms used and not defined herein will have the same meaning as in the Agreement.

1. ***

2. ***

3. ***

4. ***

5. ***

6. ***

7. ***

P.A. No. 1810
K/SWA SA-43


Southwest Airlines Co.
6-1162-JMG-669R3

8. ***

9. ***

10. Confidential Treatment.

Buyer understands that certain commercial and financial information contained in this Letter Agreement including any attachments hereto is considered by Boeing as confidential. Buyer agrees that it will treat this Letter Agreement and the information contained herein as confidential and will not, without the prior written consent of Boeing, disclose this Letter Agreement or any information contained herein to any other person or entity except as provided in Letter Agreement No. 6-1162-RLL-934, as amended. Very truly yours,

THE BOEING COMPANY

By /s/ Nobuko Wiles

Its Attorney-In-Fact


ACCEPTED AND AGREED TO this

Date: February 28, 2005

SOUTHWEST AIRLINES CO.

By/s/ Laura Wright

Its SVP and CFO

P.A. No. 1810
K/SWA SA-43


Southwest Airlines Co.
Attachment A to 6-1162-JMG-669R4

***

P.A. No. 1810
K/SWA SA-43


Southwest Airlines Co.
AttachmentB to 6-1162-JMG-669R4



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6-1162-NIW-1142

Southwest Airlines Co.
P.O. Box 36611 - Love Field
Dallas, Texas 75235

Subject: ***

This Letter Agreement amends Purchase Agreement No. 1810 dated as of January 19, 1994 (the Agreement) between The Boeing Company (Boeing) and Southwest Airlines Co. (Buyer) relating to Model 737-7H4 aircraft (Aircraft).

All terms used and not defined herein will have the same meaning as in the Agreement.

***

***

***

Buyer understands that certain commercial and financial information contained in this Letter Agreement is considered by Boeing as confidential. Buyer agrees that it will treat this Letter Agreement and the information contained herein as confidential and will not, without the prior written consent of Boeing, disclose this Letter Agreement or any information contained herein to any other person or entity except as provided in Letter Agreement No. 6-1162-RLL-934, as amended.

P.A. No. 1810 SA-43


Very truly yours,

THE BOEING COMPANY

By/s/ Nobuko Wiles

Its Attorney-In-Fact



ACCEPTED AND AGREED TO this

date:February 23, 2005

SOUTHWEST AIRLINES CO.

By/s/ Deborah Ackerman

Its VP-General Counsel

PA 1810 SA-43


Southwest Airlines Co.
Attachment A to 6-1162-JMG-1142

***

***

P.A. No. 1810
K/SWA SA-43


Southwest Airlines Co.
Attachment B to 6-1162-NIW-1142

Date: TBD
To: Southwest Airlines

***

***

PA 1810 SA-43


Supplemental Agreement No. 44

to

Purchase Agreement No. 1810

between

THE BOEING COMPANY

and

SOUTHWEST AIRLINES CO.

Relating to Boeing Model 737-7H4 Aircraft

THIS SUPPLEMENTAL AGREEMENT, entered into as of March 31, 2005, by and between THE BOEING COMPANY, a Delaware corporation with principal offices in Seattle, Washington, (Boeing) and SOUTHWEST AIRLINES CO., a Texas corporation with principal offices in Dallas, Texas (Buyer);

WHEREAS, the parties hereto entered into Purchase Agreement No. 1810 dated January 19, 1994, relating to Boeing Model 737-7H4 aircraft (the Agreement) and;

WHEREAS, Buyer has agreed to exercise two (2) July 2006 Block U-W Option Aircraft (as Block T-W Aircraft) and;

WHEREAS, Buyer and Boeing agreed to further define the previously agreed upon business considerations to address Buyer's concerns relative to certain Airworthiness Directives and;

WHEREAS, Buyer and Boeing agreed to certain business considerations applicable to Aircraft delivering March 2005 and on and;

NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties agree to amend the Agreement as follows:

***Pursuant to 17 CFR 240.24b-2, confidential information has been omitted and has been filed separately with the Securities and Exchange Commission pursuant to a Confidential Treatment Application filed with the Commission.

P.A. No. 1810 SA-44-1
K/SWA


1. The Table of Contents of the Agreement is deleted in its entirety and a new Table of Contents is attached hereto and incorporated into the Agreement by this reference.

2. Table 1 is deleted in its entirety and replaced by a new Table 1 which is attached hereto and is incorporated into the Agreement by this reference.

3. Table 2 is deleted in its entirety and replaced by a new Table 2 which is attached hereto and is incorporated into the Agreement by this reference. NOTE - Buyer now has fifty-two (52) 'banked' Rollover Option Aircraft as a result of the option exercises covered by Supplemental Agreement No. 21, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43 and 44 that may be converted to Option Aircraft at a future date subject to the terms of Letter Agreement No. 6-1162-RLL-933R19.

4. Letter Agreement No. 6-1162-JMG-669R4 entitled "Special Matters" is deleted in its entirety and replaced by Agreement No. 6-1162-JMG-669R5 entitled "Special Matters" attached hereto and is hereby incorporated into the Agreement by this reference.

5. All references in the Letter Agreements associated with Purchase Agreement No. 1810 shall be deemed to refer to the purchase by Buyer of two hundred eighty-eight (288) Model 737-7H4 Aircraft, thirty-five (35) Model 737-7H4 Option Aircraft and two hundred seventeen (217) Model 737-7H4 Rollover Option Aircraft, to the extent such reference is not specifically addressed herein.

6. The Advance Payments due upon signing assuming execution of this Supplemental Agreement on or before March 31, 2005 are:

*** for two (2) July 2006 aircraft (***each)

Buyer will pay the *** directly to Boeing on or before Thursday, March 31, 2005.

P.A. No. 1810 SA-44-2
K/SWA


The Agreement will be deemed to be supplemented to the extent herein provided and as so supplemented will continue in full force and effect.

EXECUTED IN DUPLICATE as of the day and year first above written.

THE BOEING COMPANY SOUTHWEST AIRLINES CO.

By: /s/Nobuko Wiles                 By:/s/ Tammy Romo

Its:    Attorney-In-Fact            Its:Vice President & Treasurer

P.A. No. 1810 SA-44-3
K/SWA


                             TABLE OF CONTENTS


                                                         Page          SA
                                                        Number       Number
ARTICLES


1.    Subject Matter of Sale                              1-1         SA-13

2.    Delivery, Title and Risk of Loss                    2-1         SA-28

3.    Price of Aircraft                                   3-1         SA-28

4.    Taxes                                               4-1

5.    Payment                                             5-1

6.    Excusable Delay                                     6-1

7.    Changes to the Detail Specification                 7-1         SA-1

8.    Federal Aviation Requirements and
      Certificates and Export License                     8-1

9.    Representatives, Inspection, Flights and Test Data  9-1

10.   Assignment, Resale or Lease                        10-1

11.   Termination for Certain Events                     11-1

12.   Product Assurance; Disclaimer and Release;
      Exclusion of Liabilities; Customer Support;
      Indemnification and Insurance                      12-1

13.   Buyer Furnished Equipment and Spare Parts          13-1

14.   Contractual Notices and Requests                   14-1

15.   Miscellaneous                                      15-1

P.A. No. 1810 i
K/SWA SA-44


                             TABLE OF CONTENTS CON'T


                                                                     SA
                                                                 Number
TABLE

1.    Aircraft Information Table                                SA-44

2.    Option Aircraft Information Table                         SA-44

EXHIBITS


A                  Aircraft Configuration                       SA-36

B                  Product Assurance Document                   SA-1

C                  Customer Support Document

D                  Price Adjustments Due to
                   Economic Fluctuations - Aircraft             SA-13

E                  Buyer Furnished Equipment
                   Provisions Document

F                  Defined Terms Document





LETTER AGREEMENTS


      1810-1       Waiver of Aircraft Demonstration Flight

P.A. No. 1810 ii
K/SWA SA-44


                             TABLE OF CONTENTS CON'T

                                                                   SA
                                                               Number
RESTRICTED LETTER AGREEMENTS


6-1162-RLL-932R2   Promotional Support                          SA-13

6-1162-RLL-933R19  Option Aircraft                              SA-28

6-1162-RLL-934R3   Disclosure of Confidential                   SA-14
                   Information

6-1162-RLL-935R1   Performance Guarantees                       SA-1

6-1162-NIW-890     ***                                          SA-39


6-1162-RLL-936R4   Certain Contractual Matters                  SA-4

6-1162-RLL-937     Alternate Advance Payment Schedule

6-1162-RLL-938     ***

6-1162-RLL-939R1   Certification Flight Test Aircraft           SA-1

6-1162-RLL-940R1   Training Matters                             SA-1

6-1162-RLL-941R2   Other Matters                                SA-13

6-1162-RLL-942     Open Configuration Matters

6-1162-RLL-943R1   Substitution Rights                          SA-6

6-1162-RLL-944     Airframe Maintenance Material Cost
                   Protection Program

6-1162-RLL-945     Comparison of 737-7H4 and 737-3H4
                   Block Fuel Burn

6-1162-RLL-1855R3  Additional Contractual Matters               SA-4

6-1162-RLL-1856    ***                                          SA-1

6-1162-RLL-1857    Service Ready Validation Program             SA-1
                   Field Test

6-1162-RLL-1858R1  Escalation Matters                           SA-4

P.A. No. 1810 iii
K/SWA SA-44


                             TABLE OF CONTENTS CON'T


                                                                   SA
                                                               Number
RESTRICTED LETTER AGREEMENTS


6-1162-RLL-2036    Amortization of Costs for
                   Customer Unique Changes                      SA-1

6-1162-RLL-2037    Reconciliation of the Aircraft               SA-1
                   Basic Price

6-1162-RLL-2073    Maintenance Training Matters                 SA-1

6-1162-KJJ-054     Business Matters                             SA-13

6-1162-KJJ-055R1   Structural Matters                           SA-25

6-1162-KJJ-056     Noise and Emission Matters                   SA-13

6-1162-KJJ-057     Product Development Matters                  SA-13

6-1162-KJJ-058     Additional Substitution Rights               SA-13

6-1162-KJJ-150     Flight Control Computer & Mode               SA-14
                   Control Panel Spares Matter

6-1162-MSA-185R3   Delivery Change Contractual                  SA-21
                   Matters

6-1162-JMG-669R5   Special Matters                              SA-44

6-1162-JMG-747R1   ***                                          SA-36

6-1162-CHL-217     Rescheduled Flight Test Aircraft             SA-32

6-1162-NIW-606R1   ***                                          SA-36


6-1162-NIW-640     ***                                          SA-35


6-1162-NIW-889     Warranty - Exterior Color Schemes            SA-39
                   and Markings for YA143 and on

6-1162-NIW-1142    ***                                          SA-43

P.A. No. 1810 iv
K/SWA SA-44


                                    Table 1 to
                           Purchase Agreement No. 1810
                            Aircraft Information Table





                    Base Aircraft    Special     Aircraft Basic    Base Year
                        Price        Features        Price         Dollars
Block A, B, C,
D & E Aircraft           ***           ***            ***          July 1992
Block F & G Aircraft     ***           ***            ***          July 1992
Block H Aircraft         ***           ***            ***          July 1992
Block I Aircraft         ***           ***            ***          July 1992
Block J Aircraft         ***           ***            ***          July 1992
Block K Aircraft         ***           ***            ***          July 1992
Block K-W Aircraft       ***           ***            ***          July 1992
Block L Aircraft         ***           ***            ***          July 1992
Block T Aircraft         ***           ***            ***          July 1999
Block T-W Aircraft       ***           ***            ***          July 1999

Block K-W Aircraft: Block K airplanes with production winglets installation Block T-W Aircraft: Block T airplanes with production winglets installation

SWA Page 1 SA 44


                                 Table 1 to
                         Purchase Agreement No. 1810
                          Aircraft Information Table



                                                       Escalation Estimate
Delivery           Number of          Aircraft          Adv Payment Base
  Date             Aircraft            Block              Price Per A/P
Dec-2000              2                  E                    ***
Jan-2001              1                  E                    ***
Feb-2001              1                  E                    ***
Mar-2001              2                  E                    ***
Jun-2001              3                  E                    ***
Sep-2001              3                  E                    ***
Oct-1998              1                  F                    ***
Nov-1998              2                  F                    ***
Dec-1998              2                  F                    ***
Mar-1999              2                  G                    ***
Jun-1999              2                  H                    ***
Jul-1999              1                  H                    ***
Aug-1999              1                  H                    ***
Sep-1999              2                  H                    ***
Oct-1999              1                  H                    ***
Mar-2000              1                  H                    ***
Apr-2000              2                  H                    ***
Sep-2000              1                  H                    ***
Oct-2000              2                  H                    ***
Mar-2001              2                  H                    ***
Apr-2001              1                  H                    ***
Oct-2001              3                  H                    ***
Nov-2001              2                  I                    ***
Dec-2001              1                  I                    ***
Jan-2002              1                  I                    ***
Mar-2002              4                  I                    ***
Apr-2002              2                  I                    ***
Dec-2002              2                  I                    ***
May-2003              1                  I                    ***
Jun-2003              2                  I                    ***
Jul-2003              1                  I                    ***
Aug-2003              1                  I                    ***
Sep-2003              3                  I                    ***
Nov-2002              1                  J                    ***
Dec-2002              1                  J                    ***
Nov-2003              2                  J                    ***
Dec-2003              2                  J                    ***
Mar-2004              1                  J                    ***
Mar-2004              1                  K                    ***
Apr-2004              3                  K                    ***
May-2004              1                  K                    ***
Jun-2004              2                  K                    ***
Jul-2004              2                  K                    ***
Sep-2004              1                  K-W                  ***
Oct-2004              4                  K-W                  ***
Oct-1999              1                  L                    ***


SWA                                Page 2                          SA 44

Nov-1999              2                  L                    ***
Dec-1999              1                  L                    ***
Jun-2000              3                  L                    ***
Jul-2000              3                  L                    ***
Sep-2000              1                  L                    ***
Oct-2000              1                  L                    ***
Nov-2000              4                  L                    ***
Dec-2000              1                  L                    ***
Jan-2001              1                  L                    ***
Feb-2001              1                  L                    ***
Jul-2001              1                  L                    ***
Sep-2001              1                  L                    ***
Oct-2001              1                  L                    ***
Mar-2003              2                  L                    ***
Jul-2003              1                  L                    ***
Aug-2003              2                  L                    ***
Nov-2001              1                  T                    ***
Feb-2002              1                  T                    ***
Jan-2004              2                  T                    ***
Feb-2004              1                  T                    ***
Apr-2004              3                  T                    ***
May-2004              1                  T                    ***
Jun-2004              6                  T                    ***
Jul-2004              2                  T                    ***
Aug-2004              6                  T-W                  ***
Sep-2004              4                  T-W                  ***
Oct-2004              0                  T-W                  ***
Nov-2004              3                  T-W                  ***
Dec-2004              3                  T-W                  ***
Jan-2005              5                  T-W                  ***
Feb-2005              3                  T-W                  ***
Mar-2005              4                  T-W                  ***
Apr-2005              4                  T-W                  ***
May-2005              2                  T-W                  ***
Jun-2005              4                  T-W                  ***
Jul-2005              2                  T-W                  ***
Aug-2005              2                  T-W                  ***
Sep-2005              3                  T-W                  ***
Oct-2005              2                  T-W                  ***
Nov-2005              2                  T-W                  ***
Dec-2005              1                  T-W                  ***
Jan-2006              1                  T-W                  ***
Feb-2006              4                  T-W                  ***
Mar-2006              3                  T-W                  ***
Apr-2006              2                  T-W                  ***
May-2006              5                  T-W                  ***
Jun-2006              5                  T-W                  ***
Jul-2006              3                  T-W                  ***
Aug-2006              3                  T-W                  ***
Sep-2006              3                  T-W                  ***
SWA                                Page 3                          SA 44

Nov-2006              2                  T-W                  ***
Dec-2006              2                  T-W                  ***
Jan-2007              2                  T-W                  ***
Feb-2007              3                  T-W                  ***
Mar-2007              2                  T-W                  ***
Apr-2007              2                  T-W                  ***
May-2007              2                  T-W                  ***
Jun-2007              2                  T-W                  ***
Jul-2007              2                  T-W                  ***
Aug-2007              2                  T-W                  ***
Sep-2007              2                  T-W                  ***
Oct-2007              2                  T-W                  ***
Nov-2007              2                  T-W                  ***
Dec-2007              2                  T-W                  ***
Jan-2008              1                  T-W                  ***
Feb-2008              1                  T-W                  ***
Mar-2008              1                  T-W                  ***
Apr-2008              1                  T-W                  ***
May-2008              1                  T-W                  ***
Jun-2008              1                  T-W                  ***

SWA Page 4 SA 44


                      Table 2 to Purchase Agreement No. 1810
                     (Letter Agreement No. 6-1162-RLL-933R19)
                        Option Aircraft Information Table



Price Description of Option Aircraft:

                      Base Aircraft     Special     Aircraft Basic   Base Year
                          Price         Features         Price        Dollars
Block U Option             ***            ***             ***         July 1999
Aircraft
(without Winglets)
Block U-W Option           ***            ***             ***         July 1999
Aircraft
(with Winglets)

Delivery of Rollover Option Aircraft:

Year of         Number of       Option Aircraft Block
Delivery         Option
                Aircraft
2007           Twenty (20)          Q
2008           Twenty (20)          R
2009           Six (6)              S
2009-          One Hundred          V
2012           Seventy-One
               (171)

Remaining Option
Aircraft:                                    35

SWA Page 1 SA-44


                    Table 2 to Purchase Agreement No. 1810
                   (Letter Agreement No. 6-1162-RLL-933R19)
                       Option Aircraft Information Table

Aircraft        Number of      Option        Adv Payment
                                                Base
Delivery         Option        Aircraft       Price Per
Mo. & Yr.       Aircraft        Block      Option Aircraft   Option Exercise
Oct-2006            1            U-W            ***           June 1, 2005
Apr-2007            1            U-W            ***           December 1, 2005
May-2007            1            U-W            ***           January 1, 2006
Jun-2007            1            U-W            ***           February 1, 2006
Jul-2007            1            U-W            ***           March 1, 2006
Aug-2007            1            U-W            ***           April 1, 2006
Sep-2007            1            U-W            ***           May 1, 2006
Oct-2007            1            U-W            ***           June 1, 2006
Nov-2007            1            U-W            ***           July 1, 2006
Dec-2007            1            U-W            ***           August 1, 2006
Jan-2008            2            U-W            ***           September 1, 2006
Feb-2008            3            U-W            ***           October 1, 2006
Mar-2008            2            U-W            ***           November 1, 2006
Apr-2008            2            U-W            ***           December 1, 2006
May-2008            2            U-W            ***           January 1, 2007
Jun-2008            2            U-W            ***           February 1, 2007
Jul-2008            2            U-W            ***           March 1, 2007
Aug-2008            2            U-W            ***           April 1, 2007
Sep-2008            2            U-W            ***           May 1, 2007
Oct-2008            2            U-W            ***           June 1, 2007
Nov-2008            2            U-W            ***           July 1, 2007
Dec-2008            2            U-W            ***           August 1, 2007

SWA                               Page 2                        SA-44

6-1162-JMG-669R5


Southwest Airlines Co.
P.O. Box 36611 - Love Field
Dallas, Texas  75235

Subject: Special Matters

This Letter Agreement amends Purchase Agreement No. 1810 dated as of January 19, 1994 (the Agreement) between The Boeing Company (Boeing) and Southwest Airlines Co. (Buyer) relating to Model 737 aircraft:

1) ***
2) ***

All terms used and not defined herein will have the same meaning as in the Agreement.

1. ***

2. ***

3. ***

4. ***

5. ***

P.A. No. 1810
K/SWA SA-44


Southwest Airlines Co.
6-1162-JMG-669R5
6. ***

7. ***

8. ***

9. ***

10. Confidential Treatment.

Buyer understands that certain commercial and financial information contained in this Letter Agreement including any attachments hereto is considered by Boeing as confidential. Buyer agrees that it will treat this Letter Agreement and the information contained herein as confidential and will not, without the prior written consent of Boeing, disclose this Letter Agreement or any information contained herein to any other person or entity except as provided in Letter Agreement No. 6-1162-RLL-934, as amended.
Very truly yours,

THE BOEING COMPANY

By /s/ Nobuko Wiles

Its Attorney-In-Fact


ACCEPTED AND AGREED TO this

Date: March 31, 2005

SOUTHWEST AIRLINES CO.

By/s/ Tammy Romo

Its Vice President & Treasurer

P.A. No. 1810
K/SWA SA-44


Southwest Airlines Co.
Attachment A to 6-1162-JMG-669R5

***

P.A. No. 1810
K/SWA SA-44


Southwest Airlines Co.
AttachmentB to 6-1162-JMG-669R5



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P.A. No. 1810
K/SWA SA-44


Exhibit 31.1

CERTIFICATION

I, Gary C. Kelly, Chief Executive Officer and Vice Chairman of the Board of Directors of Southwest Airlines Co., certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2005 of Southwest Airlines Co.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over


financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent

functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 15, 2005
                                       By:   /s/ Gary C. Kelly
                                             Gary C. Kelly
                                             Chief Executive Officer and
                                             Vice Chairman of the Board
                                             of Directors


Exhibit 31.2

CERTIFICATION

I, Laura H. Wright, Chief Financial Officer of Southwest Airlines Co., certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 31, 2005 of Southwest Airlines Co.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over


financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent

functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 15, 2005
                                       By:   /s/ Laura H. Wright
                                             Laura H. Wright
                                             Chief Finance Officer


Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Southwest Airlines Co. (the "Company") for the period ended March 31, 2005 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Gary C. Kelly, Chief Executive Officer and Vice Chairman of the Board of Directors of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:  April 15, 2005
                                            By   /s/ Gary C. Kelly
                                                 Gary C. Kelly
                                                 Chief Executive Officer and
                                                 Vice Chairman of the Board
                                                 of Directors


CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Southwest Airlines Co. (the "Company") for the period ended March 31, 2005 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Laura H. Wright, Chief Financial Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:  April 15, 2005
                                            By   /s/ Laura H. Wright
                                                 Laura H. Wright
                                                 Chief Financial Officer