Eastar Jet is a South Korean low-cost carrier founded in 2007 and headquartered in Seoul. The airline began operations in 2009, offering domestic and international routes across Northeast and Southeast Asia at competitive fares. The airline faced severe financial difficulties during the COVID-19 pandemic, leading to a suspension of operations in 2020 and a prolonged restructuring process. After changing ownership, Eastar Jet worked to resume flights and rebuild its network through the early 2020s. Operating under the IATA code ZE and ICAO code ESR with the callsign 'Eastar,' the carrier focuses on leisure and budget-conscious travelers seeking affordable connections between South Korea and regional destinations.