Incheon International Airport
Seoul, South KoreaICN / RKSI
International hub · 99 direct destinations · 4 runways · longest runway 13,123 ft
63 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Seoul → Chiang Mai
ICN
SeoulIncheon International Airport
SeoulIncheon International AirportCNX
Chiang MaiChiang Mai International Airport
Chiang MaiChiang Mai International Airport- Distance
- 2,101 mi
- Estimated flight time
- ~4h 45m
Chiang Mai is currently 2 hours behind Seoul.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2 flights a day, observed from October 2025 to September 2026.
- 2
- flights per day
- 4
- busiest month · Jan
- 1
- quietest month · Jun
- 5 hr 15 min
- measured flight time
- 10 / 12
- months seen
Through the year
Per day, month by month
- 4Jan2026
- 4Feb
- 2Mar
- 2Apr
- 2May
- 1Jun
- 2Jul
- 2Aug
- 3Sep
- –Oct2025
- –Nov
- 3Dec
In October 2025 we saw less traffic at Seoul in general than usual; compare that month with care.
Airlines
Who flies it
Jin Airwinter
Jeju Airall year
Eastar Jetwinter
Korean Airwinter
T'way Airwinter
Air Busansummer
Myanmar Airways Internationalnow and then
Through the day
Departure times
Local time in Seoul. Most departures between 17:00 and 20:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 1.4Mon
- 1.1Tue
- 1.7Wed
- 1.9Thu
- 1.3Fri
- 2.1Sat
- 2.3Sun
Fleet
Aircraft observed
- Boeing 737 MAX 8B38M54%
- Boeing 737-800B73819%
- Airbus A330-300A33312%
- Airbus A321neoA21N10%
- Airbus A319A3193%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 4 | 122 |
|
| February 2026 | 4 | 121 |
|
| March 2026 | 2 | 21 |
|
| April 2026 | 2 | 15 |
|
| May 2026 | 2 | 48 |
|
| June 2026 | 1 | 33 |
|
| July 2026 | 2 | 62 |
|
| August 2026 | 2 | 70 |
|
| September 2026 | 3 | 58 |
|
| October 2025 | Not seen in this month. | ||
| November 2025 | Not seen in this month. | ||
| December 2025 | 3 | 51 |
|
Airlines observed on this route
From observed callsign routes on ICN-CNX - not a booking guarantee.
About this route
- International route: Seoul and Chiang Mai are in different countries.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Seoul: 99.
- Direct destinations observed from Chiang Mai: 15.
The airports on this route
Chiang Mai International Airport
Chiang Mai, ThailandCNX / VTCC
Major airport · 15 direct destinations · 1 runway · longest runway 11,155 ft
81 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
About the route from Seoul to Chiang Mai
The observed direct connection between Incheon International Airport (ICN) and Chiang Mai International Airport (CNX) covers approximately 2,101 mi. The estimated flight time is around 4h 45m. Air Busan, Eastar Jet, Jeju Air, Jin Air, Korean Air, Myanmar Airways International and T'way Air have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Seoul from Chiang Mai by air?
- The great-circle distance between Incheon International Airport and Chiang Mai International Airport is approximately 2,101 mi.
- How long is the flight from Seoul to Chiang Mai?
- Based on the distance, the estimated flight time is about 4h 45m. This is an estimate, not a schedule.
- Is there a direct connection from Seoul to Chiang Mai?
- Yes, a direct connection between ICN and CNX has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Air Busan, Eastar Jet, Jeju Air, Jin Air, Korean Air, Myanmar Airways International and T'way Air.
- How often is there a flight from Seoul to Chiang Mai?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 601 observed flights. Mainly Jin Air, Jeju Air, Eastar Jet. That is an observation, not a timetable.
- What is the current time difference between Seoul and Chiang Mai?
- Chiang Mai is currently 2 hours behind Seoul.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.