Sun Country Airlines Holdings, Inc.

Entry into a Material Definitive Agreement. Merger Agreement On January 11, 2026, Sun Country Airlines Holdings, Inc., a Delaware corporation (the “ Sun Country

, including Exhibit 99.1 is being furnished under Item 7.01 and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject

Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 2.1 Agreement and Plan of Merger, dated as of January 11, 2026, by and among Sun Country