How do I get from the airport to Seoul?

Incheon International Airport sits about 70 kilometers west of central Seoul, on an island in the Yellow Sea. That distance sounds daunting, but the AREX Express train erases it. Board on the basement level of Terminal 1 — follow the blue and orange signage past the duty-free halls — and you're at Seoul Station in 43 minutes with no stops. The fare is 9,500 won, about $6.40. Trains depart every 30 to 40 minutes from 5:15am to 10:50pm. Seoul Station connects to subway lines 1 and 4, and from there you're one or two transfers from anywhere in the city. The seats are wide, there's actual luggage space that fits a full-size suitcase, and the cool air conditioning is a mercy when you land in thick August humidity. If you're counting every won, the AREX All-Stop train covers the same route for 4,150 won ($2.80) but takes 66 minutes and packs tight during morning rush.

Airport limousine buses are the better call if your hotel sits far from Seoul Station — in Gangnam, Jamsil, or eastern Songpa, say. Routes fan out to about 25 neighborhoods, each bus numbered and posted at curbside stops on the arrivals level. Fares run 16,000 to 17,000 won ($10.80–11.50) and the ride takes 70 to 90 minutes depending on expressway traffic. Late evening is smooth. Friday rush hour sitting on the Incheon Bridge is miserable. Regular taxis work too, but the math is hard to love: a metered cab to Myeongdong runs 55,000 to 75,000 won ($37–51) plus about 7,800 won in expressway tolls, and you're crawling through the same traffic the bus is stuck in. KakaoTaxi — Korea's dominant ride-hail app — charges similar fares but lets you book before you leave the terminal. Download it before you fly; the app works in English.

If you're arriving at Gimpo International Airport — likely from Tokyo Haneda, Shanghai Hongqiao, or a domestic Korean flight — the city is right there. Gimpo connects to Seoul Metro lines 5, 9, and the AREX commuter line. Hongdae station is 15 minutes by subway, Gwanghwamun about 25. A taxi to most central neighborhoods runs 15,000 to 25,000 won ($10–17). Gimpo feels like landing at a neighborhood airport instead of an island outpost, and that proximity is worth seeking out on regional routes when the option exists.

Buy a T-money card at any convenience store in the arrivals hall — CU and GS25 both stock them near the exit gates — and load 20,000 won onto it. That satisfying tap-and-beep on the turnstile reader works across the AREX, every subway line, city buses, and most taxis. For late arrivals after the last AREX Express at 10:50pm, the All-Stop runs until about 11:30pm. Miss that and you're left with a taxi or the overnight airport bus to Seoul Station for 16,000 won — slow, but it runs through the small hours. Pick up a local SIM or activate an eSIM before you leave the arrivals level. Data is cheap here, and navigating the Seoul Metro app without a connection while dragging luggage through a station that smells like fresh hotteok from the platform vendors is not how you want to start the trip.