Executive Change

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 28, 2025 SOUTHWEST AIRLINES CO. (Exact name of registrant as specified in its charter) Texas 1-7259 74-1563240 (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) 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 Not Applicable Former name or former address, if changed since last report Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐     Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐     Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐     Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐     Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol Name of each exchange on which registered Common Stock ($1.00 par value) LUV New York Stock Exchange Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2). Emerging growth company      ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     ☐ Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Item 5.02(c) On March 28, 2025 , the Board of Directors (the “Board”) of Southwest Airlines Co. (the “Company”) unanimously appointed J. Ryan Martinez to assume the responsibilities of the Company’s principal accounting officer, effective April 1, 2025, at which time Tammy Romo will step down from that role. Mr. Martinez, 45, is the Company’s Senior Vice President Finance & Controller. He previously served as Vice President Investor Relations of the Company from 2021 to 2023 and Managing Director Investor Relations from 2017 to 2021. Mr. Martinez did not enter into any material plan, contract, or arrangement or material amendment or receive any grant or award in connection with his designation as principal accounting officer. Mr. Martinez does not have any relationships or transactions requiring disclosure under Item 401(d) or Item 404 of Regulation S-K, nor is he a party to any arrangement or understanding with any other person pursuant to which he was selected as principal accounting officer of the Company. 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 hereunto duly authorized. SOUTHWEST AIRLINES CO. March 31, 2025 By: /s/ Jeff Novota Jeff Novota Senior Vice President Chief Legal Officer & Corporate Secretary