Jeju Air Co., Ltd. (Korean: 제주항공; Hanja: 濟州航空), is the first and largest South Korean low-cost airline. It offers scheduled domestic services between several cities in South Korea, as well as between Seoul and international destinations including Japan, China, Russia, the Mariana Islands, and various Southeast Asian countries.
As of June 2025, Jeju Air operates the following aircraft: ATR 72, Airbus A330, Airbus A340, Airbus A350, Boeing 727, Boeing 737, Boeing 747, Boeing 767, Boeing 777.
Jeju Air is operating flights from/to 49 airports in 16 countries: South Korea, Japan, China, Philippines, Vietnam, Thailand, Singapore, Taiwan, Mongolia, Hong Kong and other destinations.