AirHint found the following cheapest one-way flights from Seoul (ICN) to Chiang Mai (CNX) in December 2025 (see full year).
One-Way flights
| 02 Dec | Thai VietJet Air | ||
| 01 Dec | Eastar Jet | ||
| 16 Dec | AirAsia X | ||
| 15 Dec | HK Express | ||
| 12 Dec | HK Express | ||
| 09 Dec | Thai VietJet Air | ||
| 10 Dec | Jeju Air | direct | |
| 14 Dec | Jeju Air | direct | |
| 04 Dec | Air China | ||
| 13 Dec | Air China |
Also check the deals for return flights from Seoul to Chiang Mai in December.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
Find us on social media