Incheon Airport guide: T1 vs T2, getting to Seoul, layovers and sleeping overnight
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Incheon International Airport (ICN) is Korea's main gateway and one of the more comfortable airports in the world to arrive at, spend a layover in or even sleep in. Its main trap is that it has two terminals far apart, so knowing yours before you set off saves a lot of stress.
Terminal 1 or Terminal 2?
The two terminals are separate buildings several kilometres apart, linked by a free shuttle bus and by the AREX railway. Check the terminal on your ticket or booking before you leave for the airport.
- Terminal 2 is home to Korean Air and its group airlines. Jin Air moved there in 2023, Air Busan and Air Seoul in 2025, and Asiana Airlines moved from T1 to T2 on 14 January 2026. Many of Korean Air's SkyTeam partners also use T2.
- Terminal 1 handles most other foreign airlines and several Korean low-cost carriers.
Airlines do move, as Asiana's switch shows, so treat your booking and the airport's official website (airport.kr) as the final word.
Getting into Seoul
- AREX Express: non-stop to Seoul Station, about 43 minutes from T1 and about 51 minutes from T2, roughly every 30 to 40 minutes. You need a ticket for the express.
- AREX All-Stop: slower, around an hour, but cheaper and pay-as-you-go with a T-money card. It stops at Gimpo Airport, Hongik University (Hongdae) and Digital Media City, where you can change to the subway.
- Airport limousine buses run directly to most hotel districts and to many other cities. They are the easiest choice with heavy bags or small children. Buy tickets at the counters or machines in arrivals.
- Taxis: use the official ranks outside arrivals. Ordinary, deluxe (black) and international taxis with foreign-language drivers are available. Highway tolls are added to the fare.
The first-trip guide to Seoul covers T-money and map apps in more detail.
SIM cards and eSIM
The three Korean mobile carriers have roaming and rental counters in the arrivals halls of both terminals, where you can buy a prepaid SIM or rent pocket Wi-Fi. Many travellers now buy a data eSIM online before flying instead. Either way, install Naver Map or KakaoMap before you leave home.
Luggage storage and delivery
Both terminals have staffed luggage storage counters, useful if you want to explore without bags on a long layover or a last day. Delivery services can also send luggage between the airport and hotels in Seoul. Check hours and conditions on the airport website.
Layovers and the transit tour
If you have a long connection, the airport has run a free Transit Tour programme for transit passengers, with short trips to places near the airport and longer ones into Seoul. Eligibility has generally depended on your layover length (several hours, but under 24) and on being able to enter Korea, which can mean having a K-ETA or a visa for your passport. Seats are limited. Conditions change, so check the transit tour pages on airport.kr before relying on it.
If you would rather stay airside, both terminals have lounges, showers, cultural exhibits and plenty of seating.
Sleeping at the airport
Incheon is open around the clock and widely considered one of the better airports to sleep in.
- Free rest areas: reclining loungers in the airside transit areas, first come, first served.
- Transit hotels: airside transit hotels let connecting passengers sleep without passing immigration, usually booked in blocks of hours. Book ahead; they fill up.
- Capsule hotel: there is a capsule hotel landside, by the transport centre, if you have already entered the country.
- The free shuttle between terminals stops running late at night, so wait in the terminal your next flight leaves from.
Leaving Korea
- Arrive early in peak seasons; security queues can be long around Korean holidays.
- If you bought goods tax-free, deal with any refund at the kiosks before or after security as instructed.
- Check whether your airline allows city check-in at Seoul Station, which some travellers use to drop bags before heading out for the day.
Flying through Incheon soon? Ask your questions or share your best layover tip in the comments.