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

Return flights

04 Feb - 09 Feb	AirAsia X
01 Feb - 10 Feb	AirAsia X
04 Feb - 08 Feb	AirAsia X
01 Feb - 08 Feb	AirAsia X
02 Feb - 08 Feb	AirAsia X
27 Feb - 04 Mar	AirAsia X
04 Feb - 07 Feb	AirAsia X
01 Feb - 06 Feb	AirAsia X
01 Feb - 09 Feb	AirAsia X
01 Feb - 05 Feb	AirAsia X
01 Feb - 07 Feb	AirAsia X
04 Feb - 04 Mar	AirAsia X
23 Feb - 05 Mar	Thai AirAsia X
28 Feb - 04 Mar	Thai AirAsia X
20 Feb - 13 Mar	Eastar Jet	direct
04 Feb - 15 Mar	AirAsia X
21 Feb - 29 Mar	Jeju Air	direct
28 Feb - 13 Mar	Eastar Jet	direct
28 Feb - 15 Mar	Eastar Jet	direct
24 Feb - 13 Mar	Eastar Jet	direct

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

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 Seoul to Chiang Mai in February from $181

Return flights