AirHint found the following cheapest return flights from Chiang Mai (CNX) to Seoul (ICN) in January 2026 (see full year).

Return flights

09 Jan - 12 Jan	Thai AirAsia
16 Jan - 24 Jan	Cebu Pacific
09 Jan - 19 Jan	Cebu Pacific
07 Jan - 11 Jan	Cebu Pacific
10 Jan - 15 Jan	Thai AirAsia
06 Jan - 20 Jan	Thai AirAsia
06 Jan - 27 Jan	Thai AirAsia
09 Jan - 20 Jan	Thai AirAsia
09 Jan - 27 Jan	Thai AirAsia
24 Jan - 31 Jan	HK Express
29 Jan - 03 Feb	Thai AirAsia
29 Jan - 02 Feb	Thai AirAsia
29 Jan - 09 Feb	Thai AirAsia
22 Jan - 03 Feb	Thai AirAsia
22 Jan - 02 Feb	Thai AirAsia
22 Jan - 09 Feb	Thai AirAsia
20 Jan - 03 Feb	Thai AirAsia
20 Jan - 02 Feb	Thai AirAsia
20 Jan - 09 Feb	Thai AirAsia
19 Jan - 03 Feb	Thai AirAsia

Also check the deals for one-way flights from Chiang Mai to Seoul in January.

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.

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Cheapest return flights from Chiang Mai to Seoul in January from $341

Return flights