Gimhae International Airport (IATA: PUS, ICAO: RKPK) is the primary airport serving Busan, South Korea's second-largest city and the country's busiest port. Located in the Gangseo District of Busan, the airport handles both domestic and international flights and ranks as the second busiest airport in South Korea after Incheon International Airport. The airport sits on the west bank of the Nakdong River and has historically faced operational constraints due to surrounding terrain and its proximity to the Gimhae military air base, which shares the facility. Plans for a new airport, Gadeokdo New Airport, have been approved to eventually replace Gimhae as Busan's primary commercial aviation hub. Gimhae serves millions of passengers annually, connecting Busan to major destinations across Asia and select long-haul routes. It is a hub for Korean Air and a focus city for several low-cost carriers including Air Busan, which is headquartered at the airport.