Whether you are flying out of Incheon, or Gimhae, there are buses to get you straight to the airport from Changwon.
Gimhae International Airport (PUS)
**Please not that “Masan Station” refers to Masan KTX Train station, not a bus terminal in Masan.
Above are the places to pick up the bus that goes directly to Gimhae Aiport. Most of the stops are easy to identify, but the Jinhae stop (though only once a day) is not easy, so we here is the street view of its location in downtown Jinhae.
The cost of the bus from Masan to Gimhae Airport is a mere 6,800 won, while a taxi will set you back between 50,000 to 70,000 won, depending on where you are coming from.
The buses back from Gimhae Airport run every 20 to 30 minutes until 9:45 pm.
Incheon International Airport (ICN)
Bus from Changwon Bus Terminal to Incheon Airport
Day buses: 4:10, 6:00, 8:10, 10:10, 12:00
Night buses: 23:40, 1:10, 2:10
Bus from Masan Shiwae Bus Terminal to Incheon Airport
Day buses: 4:30, 6:30, 8:30, 10:30, 12:30
Night buses: 00:10, 1:40, 2:40
Buses from Incheon Airport (ICN) to Changwon
07:10, 08:40, 10:30, 13:20 , 15:20, 17:50, 19:50 and 22:10 (cost is between 40,000 and 47,000 in cash only)
Buses from Incheon Bus Terminal (NOT THE DIRECT AIRPORT SHUTTLE) to Changwon are very hour between 8am and 4pm. Then 5:30pm, 11:00pm and midnight.