Incheon International Airport

Incheon International Airport was built to the west of Seoul and opened in 2001, taking over from Seoul Gimpo airport as the nation's international hub. It has comprehensive connections to the South Korean capital, and is frequently rated in the top three airports in the world. The terminal buildings are architecturally very impressive, and are a pleasure to look at, even if you are not flying. The airport is beautiful, meticulously clean and well maintained. There's plenty to keep one occupied while waiting. The nearby city of Incheon is also a significant center of industry.
A second terminal was opened in time for the 2018 Winter Olympics.

Incheon is the main international hub for both Korean Air and Asiana, with many airlines flying from North America, Europe, Africa, Australasia and Asia.
The vast majority of domestic Korean flights, as well as some international flights to China, Japan and Taiwan, are still handled by Seoul Gimpo airport which is a short AREX train journey from Incheon airport.
There are a limited number of direct flights from Seoul Incheon to both Busan's Gimhae International Airport and Daegu every day. These cost slightly more than the corresponding flights from Gimpo, but they are much more convenient if you arrive on an international flight. These are actually treated as international connections, and you will pass immigration later at your destination.

• Terminal 1: All airlines not in Terminal 2
• Terminal 2: Air France, Delta, KLM, Korean Air (original members), Aeromexico, Alitalia, China Airlines, Garuda Indonesia, XiamenAir, Czech Airlines and Aeroflot (from October 28, 2018) - other Skyteam members will move after further expansion

By train

A'REX (Airport train)

The A'REX train link connects the airport to Seoul Station (for further connections to KTX high-speed services) and Gimpo Airport (most domestic flights), operating from 05:20 until 00:00. There are express services and all-stop services.
Express services to the city (every half hour) takes 43 minutes (Terminal 1 to Seoul Station) or 51 minutes (Terminal 2 to Seoul Station) and cost ₩8,500/₩7,000 (adult/child) (with WiFi available on board). There is a discounted fare of ₩7,500 for travelers taking a roundtrip within 15 days, groups of three and passengers of certain airlines (see here for more details and discounts).
All-stop services (every 6 minutes as part of the Seoul Subway system) take an hour and cost ₩4,150 from T1/₩4,750 from T2. Many times it's faster to take the All-Stop than the Express train.
The All-Stop and the Express train leave from different platforms and have separate ticket booths.
Travelers coming from Seoul Station to Incheon need to enter the subway area with a T-money or single entry ticket to access the AREX platforms. The cost of the subway ticket is refunded when buying an AREX ticket. The All-Stop train requires a T-money card or single entry ticket, which require cash. The Express train can be paid with credit card as well.
If you are flying with Korean Air, Asiana Airlines, T'Way Air and Jeju Air you can check into your flight at Seoul Station before you get on the AREX Express train if you are there at least 3 hours before your departure time. Immigration officers are also on hand to stamp your passport, which means you are processed and can quickly go through the Diplomatic Departures entrance in Incheon Airport. Look for description of City Airport terminal below.
Travel time to Gimpo Airport is 28/35 minutes, with both services charging ₩3,100, making this the fastest and cheapest option for inter-airport transfer as well.

KTX

Korea's high speed rail service (KTX) used to run to and from Incheon Airport, connecting directly to Seoul station, Daejeon, Daegu, Ulsan and Busan. But this connection will no longer be operated from 2018. To use KTX to go to other cities, use AREX and go to Seoul Station or Bus No. 6770 (₩15000) to Gwangmyeong Station. Bus 6770 is operated by Korail, and there is a ₩3000 discount for the combined ticket for KTX and the bus.
City Airport Terminal at Gwangmyeong Station can be faster than going to Seoul station, so look for description below.

Maglev train

In February 2016, Incheon opened a new maglev line to the area around the airport and adjacent Yongyu Island. It begins at the airport A'REX station and ends at Yongyu Station, stopping at the airport administration building, long-term parking lots, and a couple of other places along the way. With a maximum speed of , it is not exactly in the same class as the Shanghai Maglev, but may still be interesting to tourists wishing to ride a maglev for the first time or those in town for an event on Yongyu. The train runs every 15 minutes from 09:00 and 18:00, and fares are free for the first few years after opening.

By bus

When traveling into Seoul with a lot of luggage or are heading to southern parts of Seoul (eg. Gangnam) then the airport buses are a very good option. Limousine buses (₩15,000 to/from city for one way, ₩6,500 to/from Gimpo Airport (domestic flight)) travel directly to major areas and big hotels in Seoul, while public buses (₩8,000-9.000) will take you to major transit hubs. If you're visiting for the first time, it's worth paying a bit extra for the limousine bus. For either bus type, consult the big maps or staff to figure out which route best suits your needs; you can then find the shuttles outside 1st floor arrivals (if possible get this information from your hotel before arriving). Or simply, walk out and ask the many ticket sellers (they are wearing vests) which bus goes to your hotel because if it's a popular one or in a popular area, they'll surely know which you'll need. It's best to buy tickets at any of the ticket gates near the bus arrival area but you can also pay the fare using won or a T-Money card if you have one. The limousine bus drivers are extremely friendly but don't count on them knowing too much English. There are maps inside the buses letting passengers know which stops are upcoming and these are also announced in Korean and English. Pressing any of the red buttons inside signals to the driver you want off at the next stop.
You can purchase and recharge a T-Money card at the GS25 store which is located at the end of the arrivals area, next to "International Arrivals F" exit.
If you have a late flight and plan on getting into Seoul via bus, make sure you get out to the curb as soon as you can. The last buses run shortly after the last flights land. If you miss your bus, you'll be stuck paying for a taxi, as the trains will stop running too.
There are also inter-city and express bus to cities other than Seoul.

By taxi

A taxi direct to Seoul will cost around ₩50,000/70,000 regular/deluxe. Black deluxe taxis (모범 택시) and almost all regular taxis accept credit cards, but a few regular taxis (일반 택시) may not. Ask the driver before you get on if you can pay by credit card. You are expected to pay any road tolls on top of the meter fare. Having your destination written down in Korean will be very helpful. Steer clear of taxi drivers trying to pick you up from inside the terminal and even the bus stop. As both buses and taxis are subject to traffic, allow extra time for rush hour delays (or take the train back).

By car

It is connected by two highways. Incheon International Airport Expressway(No. 130) is connected to Seoul and north of Incheon. Incheon Bridge(No. 110, the longest bridge in South Korea) is for the people heading to the south of Incheon or other parts of region.

City Airport Terminal

At the City Airport Terminal, you can check your bags and even pass through security and immigration, allowing you to skip the lines at the airport and to spend a little longer in the city, or helping you make a mad dash to the airport. It is located at COEX, Seoul Station, and Gwangmyeong Station. Not all airlines operate at City Airport Terminals. Make sure to check.

There are two terminals. Terminal 1 houses Asiana Airlines, Jeju Air, and other foreign airlines. Separate Concourse is connected to the main terminal 1 by a fast underground train. New Terminal 2 is operated by Korean Air, Delta, KLM, and Air France. Transfer between terminals and concourse is done by the train. Free shuttle bus between landside of Terminal 1 and 2 is operated, too.
The airport is well signposted and caters to all your traveler needs, and even includes a small mall. It's spread out over five floors:

• 4F: Viewing lounge, upscale restaurants, food court
• 3F: Departures/Transit level, tax-free shopping, fast food
• 2F: Business center
• 1F: Arrival level, tourist information, buses and taxis
• B1F: Starline shuttle (transit side) "Spa on Air" sauna, cafeteria, hospital (land side)

General

• Incheon is somewhat close to the North Korean border, and dedicated DMZ tours are available if you have some hours to spare.
• A booth in the arrival hall offers "free Korea Transit Tours". See the Visitkorea site and the airport site for more details. The only downside is that the last trip starts at 15:00. If you have a few hours to spare from 15:00 onwards, you'll have to figure out the trip arrangements yourself. If you want to visit the small Yonggungsa Temple (location #1 on the "free Korea Transit Tours" suggestion), which is not overwhelmed by tourists, the taxi round trip is about US$30 and 40 minutes (two-way travel time). Bus is significantly cheaper, but will take several times as long. The airport information booth can help you plan this trip, or you can use Google Transit to plan this trip. The Google Map friendly address of this Temple is "667 Unnam-dong, Jung-gu, Incheon, South Korea".
• Revive yourself with a reasonably priced Korean sauna experience on the basement level.

• JES Massage Center

  phone: +82 32 743 6925
  address: 2 locations: Passenger Terminal 4th Floor Rest & Relax Zone & Concourse A
• Learn about Korean traditional culture in the dedicated cultural learning center. This is actually very well organized.
• There is also a small museum at the airport that you can walk through in less than 5 minutes.
• There is a lovely garden inside the airport to relax by.
• See the occasional parade going through the airport.
• Virtual reality games
• Areas for kids
• Watch a traditional Korean performance troupe walk through the airport.
• Grab a coffee and surf free internet in the Samsung lounge.

• You can surf the internet free almost anywhere on the airport thanks to free Wi-Fi (hassle free - no registration of any kind required, connect to Airport Wi-Fi network and you are good).

Lounges

• Korean Air has a very large lounge for 'Morning Calm' passengers, equivalent SkyTeam members, Prestige class passengers, and First class passengers. Showers are good, but a long wait is possible during busy times. There are separate lounges for First class and Prestige class.
• Cathay Pacific has a functional lounge with basic refreshments, bathrooms, comfortable seating and fast internet. It does not offer showers. It is in the satelite terminal near the gate for Cathay flights
• Asiana

Restaurants

Land-side there is a food court named "Food on Air" in the first floor that offers Korean, Chinese and Japanese, and a lot of other menus. It is divided with two parts, which is called as "Studio 1" and "Studio 2". Two separate studios have different menus. It is popular with airport workers. Also, there is a McDonald and a KFC on the first floor. There is also a Paris Croissant Kitchen, which offers a varied pastas and a variety of breads.
On Incheon Airport Transport Centre, there is a Korean BBQ restaurant named "Bong Pi Yang". Also, there is a small cafe named "MojiTalk", which sells salads and pastas.
Air-side there are some fast food establishments on the ground floor, however the fourth floor above them has higher quality restaurants with good Korean food. Definitely worth trying if you are on a stop-over and want to experience something of Korea's food.

Cafes

There are Starbucks and Gloria Jean coffee outlets on the air-side. For novelty value, there is a new "Hello Kitty" cafe as well.
There is a Starbucks in the basement of the land side, as Coffee Bean & Tea leaf, Dunkin Donuts on the Departure Floor, Floor 2.

Incheon is a pretty good shopping experience. Duty Free shops offer many products specific to Korea such as Soju (rice wine) and Ginseng root herbal products. All the luxury goods are also available. There are some electronic shops, although not with the range and prices that you would expect of a major electronics player such as South Korea.
Note that you have to leave sufficient time (around an hour) between buying your duty free product and your airline departure time.
There are many global ATMs and currency exchanges throughout the terminal. Free Internet access is available in the transit zone. The airport is open 24 hours, although most shops are closed from 21:00 to 07:00.

Air side there is a Samsung lounge with a selection of comfortable seats and battered laptops with which you can freely browse the internet.
There is free airport WiFi (AirportWiFi) available on both land and air side. This apparently has a one week limit, with a warning thereafter.
The "ollehWiFi" and "T wifi zone" WiFi hotspots are, as elsewhere in South Korea, available to subscribers.
There are power outlets and USB charging ports next to all seats near the gates.

There is a 24 hour prayer room near Gate 29. (Not faith specific)
There are a few smoking rooms around.

If you're connecting through ICN to another destination on Korean/Asiana and have over 6 hours to spare, you may be entitled to a free transit tour or hotel — ask at the transit desk.

• Spa on Air sauna

• Hyatt Regency Incheon

  phone: +82 32-745-1234

• Best Western Incheon Airport

Incheon is actually built near Yeongjong Island and the important city of Incheon is also nearby. Most travelers will however just go directly into Seoul with the fast and convenient transport links.
Day tours direct from the airport to the Korean Demilitarised Zone (DMZ) on the border with North Korea are available, given you have enough time between flights (at least 8 hours).
Near the north side of the airport is a ferry to the smaller nearby islands of Sindoli and Jangbongni.