Chiang Mai to Seoul (CNX–ICN) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
CNX–ICN is served by 5 airlines with nonstop service. Jeju Air, Jin Air and Air Busan lead the route. The flight covers 2,102 miles in approximately 5h 5m. Beyond nonstop, 20 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| 7C Jeju Air | 7 | 738 | 5h30 | – | – | – |
| LJ Jin Air Also: KE | 7 | 7M8 | 5h05 | – | – | KE |
| BX Air Busan | 4 | 321 | 5h25 | – | – | – |
| ZE Eastar Jet | 4 | 738 | 5h15 | – | – | – |
| TW T'way Air | 0 | – | – | – | – | – |
Weekly Schedule Pattern
Connection Landscape
Travel Essentials
CNX: +07 · ICN: KST
When it's 6:00 PM in Chiang Mai, it's 8:00 PM in Seoul.
Thai passport holders enter South Korea visa-free for up to 90 days. You need a K-ETA (Korea Electronic Travel Authorization) approved before boarding, applied for at k-eta.go.kr. The K-ETA costs KRW 10,000 (about THB 260) and is valid for 3 years with multiple entries. Through December 31, 2026, the K-ETA fee is waived for Thai nationals. Passport must be valid for at least 6 months beyond the date of entry. A return ticket may be requested at immigration.
At Incheon (ICN), immigration is fast. Automated gates are available for repeat visitors enrolled in the SES (Smart Entry Service) program. First-time visitors go through the staffed lanes and get fingerprinted and photographed. The 90-day visa-free stay covers tourism and short business visits but not employment. If you plan to study or work, apply for the appropriate visa at the Korean Embassy in Bangkok before departure.
Direct flights from Bangkok Suvarnabhumi (BKK) to Incheon run about 5 hours on Thai Airways, Korean Air, Asiana, and several low-cost carriers including Thai AirAsia X and Jin Air. South Korea uses the Korean won (KRW), trading at roughly 38 KRW per THB 1. T-money cards work on all Seoul metro, buses, and taxis at KRW 1,400 per metro ride (about THB 37). Card payments work everywhere. Convenience stores sell T-money cards for KRW 2,500.
AREX Direct Train to Seoul Station (43 min, ₩11,000) is a reserved-seat express. The All-Stop train serves Hongik University, City Hall, and other inner-city stations (66 min, ₩4,550). T2 passengers board at a dedicated T2 stop before T1; don't exit early. City Check-in at Seoul Station allows bag drop and boarding pass printing before the train for select airlines.Limousine buses serve major hotel zones and neighborhoods (₩16,000–18,000). Taxis from ICN to central Seoul cost ₩65,000–90,000; use only official orange (general) or black (deluxe) cabs from the designated stands. KakaoTaxi (ride-hail) operates from the airport.
Humid continental climate. Winters are cold and dry (−8 to 2°C, December–February) with occasional snow and wind chill. ICN handles snow well, though heavy falls delay operations. Summer monsoon (Changma) runs late June through July with heavy continuous rain. Typhoons can affect operations August–September with short notice.
Spring brings Yellow Dust (hwangsa) from China. Fine particulate storms reduce visibility and occasionally disrupt flights in March–April. Autumn (October–November) is the best flying season: clear skies, low humidity, 8–18°C. Pack layers for spring and fall. Summer is hot and humid (25–32°C).
CNX–ICN Quick Facts
Frequently Asked Questions
Flights from CNX to ICN
Chiang Mai International Airport (CNX) and Incheon International Airport (ICN) are connected by nonstop service from Jeju Air, Air Busan, Jin Air, T'way Air and Eastar Jet. With 22 weekly departures, this is a well served route.
CNX to ICN Flight Duration and Schedule
Nonstop flight time from CNX to ICN ranges from 5 hours 5 minutes to 5 hours 30 minutes. The route covers a distance of 2,102 miles (3,382 km). There are approximately 22 weekly flights outbound and 22 return, totaling 44 flights per week in both directions.
Connecting Options and Alternatives
20 one-stop connections are available, with the fastest taking approximately 7 hours via HUN. Two-stop connections are also available via intermediate hubs.