Step 1 Before you fly

Arriving at Incheon or Gimpo

The entry forms, which terminal, and the best way into the city for where you're staying.

Do this first

K-ETA or arrival card?

US, Japan, Taiwan, Hong Kong (and Macau, Singapore, Canada, Australia and some European countries): you don't need a K-ETA until December 31, 2026. The exemption after that hasn't been announced.
Without a K-ETA, you fill in an arrival card. Do it online on the official e-Arrival card site, from 3 days before you land (Korea time).
Want to skip the arrival card? Apply for a K-ETA anyway. It costs a fee, and K-ETA holders don't need an arrival card.
Mainland China passports: you normally need a visa. Groups of 3 or more on a tour run by a designated travel agency can enter without one until December 31, 2026. Check with the Korean embassy or consulate.

e-Arrival card (official)K-ETA (official)

Incheon: Terminal 1 or 2?

Terminal 2: Korean Air, Asiana Airlines, Jin Air, Air Seoul, Air Busan, Delta and some others. Most other airlines use Terminal 1.

Codeshare flights can use a different terminal. Check your e-ticket, or search your flight on the Incheon Airport site. A shuttle bus runs between the terminals.

Into the city

Staying in Hongdae	AREX all-stop train to Hongik Univ. Station. ₩4,650 from T1, ₩5,250 from T2, with a transport card.
Staying in Myeong-dong	AREX to Seoul Station, then subway Line 4. All-stop ₩4,750 from T1, ₩5,350 from T2.
Staying in Gangnam	Airport limousine bus: 6020 (Yeoksam) or 6703 (Gangnam, COEX). Check the stops on the Incheon Airport site.
Lots of luggage	Taxi from the official stand. Taxi fares and stands

AREX Express or all-stop?

The Express train runs non-stop to Seoul Station: 43 minutes from T1, 51 from T2, ₩13,000 for an adult. The all-stop train is cheaper and stops at Gimpo Airport, Hongik Univ. and Seoul Station.

Limousine bus tickets

Buy before you board: at the ticket booths or kiosks (T1 1st floor, T2 basement), or on the T-money website or app. VisitKorea says you can't pay cash or tap a transport card on board.

Landing late at night

The last AREX all-stop train from T1 to Seoul Station leaves around midnight. After that, night buses run from Incheon:

N6000 to Gangnam Express Bus Terminal, ₩17,000
N6002 to Cheongnyangni, ₩18,000
N6701 to Dongdaemun Design Plaza, ₩18,000
N6703 to Gwangnaru

Times change by terminal. Check the night bus page before you fly.

Landing at Gimpo

Gimpo Airport has subway Lines 5 and 9, AREX and the Gimpo Goldline.

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Sources

Official pages, checked 2026-10-23.