Sun Country Airlines Holdings, Inc. is an air carrier operating scheduled passenger, air cargo, and charter air transportation and related services in the United States, Latin America, and internationally. It operates through two segments, Passenger and Cargo. The company also provides aircraft, crew, maintenance, and insurance services under ad hoc, repeat, short-term, and long-term contracts, as well as loyalty program rewards and ancillary services. As of December 31, 2025, its fleet consisted of 70 Boeing 737-NG aircraft, including 47 passenger aircraft, 20 cargo aircraft, and 3 aircraft leased to unaffiliated airlines. It serves leisure and visiting friends and relatives passengers, charter and cargo customers, military branches, collegiate and professional sports teams, wholesale tour operators, schools, companies, and other individual entities through its website, call center, and travel agents. Founded in 1982 and headquartered in Minneapolis, Minnesota, Sun Country Airlines Holdings, Inc. has operated as a subsidiary of Allegiant Travel Company since May 13, 2026.