Train (AREX) Express Trains depart every 20 to 40 minutes from Incheon Int'l Airport and take approximately 40 minutes. All Stop Trains leave every 5 to 10 minutes and take just under 60 minutes to get to Seoul Station. The Express Train costs KRW 9,500 each way, while the All Stop Train is KRW 4,150 - 4,750.