KTO lists three rail links from Gimpo International Airport: Seoul Subway Lines 5 and 9, plus the AREX all-stop commuter railway. AREX can be useful for Seoul Station, while other districts may be better served by Line 5, Line 9 or transfers. Check whether trains are express or local and confirm the correct station exit before travel.
Changes to routes, stops, operating hours or prices should be verified with the transport operator before boarding.