Seoul Airport (ICN) — Direct Flights, Airlines, THB Fares

Incheon International Airport (ICN, ICAO RKSI) is in Seoul, South Korea. It is the based hub of Korean Air and Asiana Airlines. In the SiamFlights catalogue, ICN is served by 5 airlines across 3 routes (0 outbound, 3 inbound).

Airport at a glance

Our catalogue records 0 outbound and 3 inbound corridors at Incheon International Airport (ICN / ICAO RKSI), serving Seoul, South Korea, across 5 carriers with 2 of them based here. Time zone Asia/Seoul. Frequency across the corridors touching this field totals about 84 departures a week.

Coordinates are for checking, not decoration. ICN sits at 37.4691, 126.451. That is genuinely useful when booking a room or a transfer, because “near the airport” is claimed to wildly different standards. In a large city, map distance and real travel time in peak hours diverge sharply — read the travel time for the hour you will actually move, not the kilometre figure.

IATA and ICAO are used in different places. The three-letter ICN is the IATA code that appears on tickets, bag tags and search screens; RKSI is the four-letter ICAO code used in flight plans, notices to airmen and operational paperwork. IATA codes can collide for historical reasons; ICAO codes do not, and their first letters encode the region. A four-letter code in aviation documentation is not an error — it is a different system.

Airlines serving ICN

5 carriers appear at ICN in our catalogue and we hold an airline row for 3 of them, with baseline baggage spanning 30 to 30 kg. Alliances present: SkyTeam, Star Alliance. 2 of them are based here. The corridors touching this field connect 2 countries in our catalogue.

The alliances present here shape connections. SkyTeam, Star Alliance operate at ICN, which opens through-checked bags and continuous boarding passes on a single ticket. The caveat: sharing a terminal with a partner logo does not mean your two flights are actually connected. The agreement attaches to the carrier pair and the ticket type, not to the building.

Carriers we hold no row for. T’way Air and Jin Air appear at this airport in our catalogue but have no alliance or baggage record in our database, so we print a dash instead of guessing. Check those carriers’ own pages before buying — an empty cell is more honest than an unsourced number.

ICN route overview

ICN has 0 outbound corridors in our catalogue, roughly 0 departures a week All figures are estimates of the standard schedule. 5 carriers appear at ICN, 2 of them based at the field. Frequency across the corridors touching this field totals about 84 departures a week.

Inbound

This field sits in our catalogue as a destination. We record 3 inbound corridors into it, splitting 3 medium-haul (4–7h), and no outbound guides — we build route pages only for journeys starting in Thailand. Departures from here exist; they simply have no page in this set yet. Read the carrier’s own schedule for the return.

Outbound and inbound are asymmetric because this is a catalogue boundary. We record 0 outbound and 3 inbound corridors for ICN. The gap reflects which route guides we chose to build — weighted to what travellers from Thailand search — not one-way service. The return flights exist whether or not we have published a page for them yet.

Corridors & fares from ICN

The 3 corridors at ICN break down as 3 medium-haul (4–7h), serving mainly ASEAN & regional leisure. We hold a cached fare for 3 of 3 routes, the lowest ฿3,860 on BKK–ICN. The field runs on Asia/Seoul, ICAO RKSI.

Most ICN corridors here serve ASEAN & regional leisure travellers. The mix is 3 medium sectors (4–7 h). 1 are labour-migration or diaspora corridors where extra-baggage allowances matter. Fares are shown in Thai baht (THB), and each route guide below carries live cached prices.

Everything is shown in baht, and that matters more than it looks. Fares are converted to THB so they compare on one page, but the underlying prices are set in the currency of the market that issues the ticket. The same corridor can price differently issued in different countries, and the exchange rate moves between our capture passes. Read these as a ranking, not as accounting figures.

This airport serves several passenger groups at once. The cluster spread across ICN corridors is ASEAN & regional leisure (2), GCC labour & Muslim pilgrims (1). The difference is visible on the ground: labour and pilgrimage traffic moves in groups with heavy baggage, which lengthens check-in queues in particular hours of the week, while regional leisure flights spread more evenly. Allow extra time if you fly in a window when several group departures stack up.

Direct flights to ICN — 3 routes

Our catalogue records 3 inbound corridors into ICN from 1 country, block times 5.5 to 6.2 hours. Frequency figures are estimates combining every carrier on the corridor. 3 of those corridors carry a cached fare, the lowest ฿3,860. The field runs on Asia/Seoul, ICAO RKSI.

• BKK → ICN — 56×/wk, 5.5 h, low ฿3,860
• HKT → ICN — 21×/wk, 6.2 h, low ฿5,167
• CNX → ICN — 7×/wk, 6.0 h, low ฿4,682

Direct destinations are not all reachable destinations. This list is the nonstop network in our catalogue. Everything else is reachable by connecting at a hub, which widens the choice and adds a point where the plan can break. If you must connect, make a single ticket the default and only split it when the saving is large enough to be worth the risk you are taking on yourself.

The destination country sets the rules, not the departure airport. The corridors here span 1 country, each with its own aviation regulator, visa regime and transit conditions. What you are owed changes with the destination and the direction of travel, not with the airport you left from. The route guides carry the detail per corridor.

Time zone and connecting at ICN

ICN runs on Asia/Seoul, 2h ahead of Bangkok. The gap is constant year-round. Every time printed on a boarding pass is local to that airport rather than an elapsed duration, so subtracting one from the other gives you the wrong number.

International-to-domestic is a full re-entry. At most airports that connection means clearing immigration, reclaiming the bag for customs, then checking in and passing security again — even on a single ticket. It takes materially longer than an international-to-international transfer. Plan around the actual steps rather than the gap printed on the itinerary.

Offsets make overnight flights deceptive. With ICN 2h ahead of Bangkok, a late-night departure can arrive the same morning or the next one on paper for identical flying time. That is the single most common reason transfers and first hotel nights get booked on the wrong date. Read the date on the final sector’s boarding pass, then confirm anything on the ground.

Minimum connection time is not in our data. Every airport publishes one, and the figure differs for domestic-to-domestic, international-to-international and terminal-change connections. A booking system will not sell you less than that on a single ticket — but it will happily let you build less than that yourself across two tickets. That is where passengers most often create risk without realising it.

FAQ

Where is ICN airport located?

ICN (ICAO RKSI) is in Seoul, South Korea.

Which airlines serve ICN?

5 airlines serve ICN, including Korean Air, Asiana Airlines, Thai Airways and T’way Air. Compare baggage and alliances in the table above.

How many routes run from/to ICN?

The SiamFlights catalogue lists 0 outbound and 3 inbound routes for ICN.

Is ICN an airline hub?

ICN is a primary hub for Korean Air and Asiana Airlines.

What is the difference between ICN and RKSI?

ICN is the three-letter IATA code used on tickets and bag tags; RKSI is the four-letter ICAO code used in flight plans and operational documents. They are different systems, not an inconsistency.

How far is ICN from Bangkok time?

ICN runs on Asia/Seoul, 2h ahead of Bangkok. It does not change clocks seasonally, so the gap is constant.

Why do some ICN corridors show no fare?

Because no capture succeeded in the latest pass of our cache. Seasonal and low-frequency corridors report irregularly. A blank is not a closed route or an expensive one.

Related

• BKK → ICN
• HKT → ICN
• CNX → ICN