Connection time calculator, immigration and security, and how to move between terminals at PUS.
At Busan Gimhae airport, passengers connecting between two international flights can usually stay in the transit area without going through immigration. If you connect from an international to a domestic flight, you enter the country here: you go through immigration and collect and re-check your bags.
The airport has 2 terminals or concourses (International terminal, Domestic terminal). They are not connected after security: changing means going through security again.
Is your layover at PUS long enough? Pick your connection and get an estimate with the times of this airport.
Terminals / concourses: International terminal, Domestic terminal
Getting between them: Walking between the domestic and international terminals (a few minutes)
Gimhae has separate international and domestic terminals next to each other, within walking distance. International-to-international passengers can change gates inside the international terminal without entering the country.
Korean Air and Asiana flights between Gimhae and Incheon are operated as international flights: you clear immigration at Gimhae and connect at Incheon without further passport control.
Estimate based on typical times at this airport, not your airline's official minimum connection time. Immigration and security lines change with the time of day and season. On a single ticket, the airline must rebook you if you miss the connection; on separate tickets, it does not.
Sources: en.wikivoyage.org.
Times are estimates: always check with your airline.
