Incheon International Airport is 48.8km from Seoul city center.
Taxi - taxis leave from outside the Arrivals Gate. You can choose between a regular, deluxe or jumbo taxi. If you want a driver who can communicate in English, Japanese, or Chinese, request an international taxi at desk no. 23 and 46 at the Arrivals Gate.
Bus - deluxe and standard buses connect the airport with most parts of Seoul.
Train - the Incheon Airport Railroad express (AREX) station is in the Transport Center, next to the main terminal building. Trains go to Gimpo International Airport and Seoul. The new Terminal 2 is also served by Airport Railroad Express. Souvenir and stationery stores, restaurants, a 7-Eleven selling SIM cards and currency exchange counters can be found at the train station.
Hotel shuttle - most hotels in downtown Seoul offer airport shuttles for a reasonable fee with pick-ups outside the airport; many will also offer complimentary shuttle services around town.
Car rental - the car rental desks are in the 1F Public Area of the airport. You're advised to specify the language you want for your GPS when booking.