Eastar Jet (ESR) (Korean: 이스타 항공) is a low-cost airline with headquarters in Banghwa-dong, Gangseo-gu, Seoul. The airline operates scheduled flights to more than 14 destinations in eight countries. Its main base is Gimpo International Airport, with a hub at Jeju International Airport.
As of June 2025, Eastar Jet operates the following aircraft: Boeing 737.
Eastar Jet is operating flights from/to 24 airports in 7 countries: South Korea, Japan, China, Taiwan, Vietnam, Thailand, Kazakhstan.