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

Return flights

31 Jan - 03 Feb	AirAsia X
29 Jan - 05 Feb	AirAsia X
31 Jan - 04 Feb	AirAsia X
29 Jan - 10 Feb	AirAsia X
26 Jan - 05 Feb	AirAsia X
26 Jan - 04 Feb	AirAsia X
26 Jan - 03 Feb	AirAsia X
12 Jan - 10 Feb	AirAsia X
13 Jan - 08 Feb	AirAsia X
20 Jan - 10 Feb	AirAsia X
12 Jan - 20 Jan	AirAsia X
16 Jan - 21 Jan	Air China
16 Jan - 22 Jan	Air China
10 Jan - 25 Jan	China Eastern
06 Jan - 11 Jan	China Eastern
16 Jan - 20 Jan	China Eastern
14 Jan - 19 Jan	AirAsia X
14 Jan - 15 Jan	AirAsia X
12 Jan - 17 Jan	AirAsia X
10 Jan - 31 Jan	China Eastern

Also check the deals for one-way flights from Seoul to Chiang Mai 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 Seoul to Chiang Mai in January from $185

Return flights