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

Return flights

31 Jan - 06 Feb	Thai VietJet Air
12 Jan - 17 Jan	Air China
05 Jan - 19 Jan	Air China
31 Jan - 07 Feb	Thai VietJet Air
31 Jan - 04 Feb	Thai VietJet Air
26 Jan - 30 Jan	Air China
31 Jan - 11 Feb	Thai VietJet Air
07 Jan - 21 Jan	China Eastern
10 Jan - 13 Jan	Air China
24 Jan - 28 Jan	Malaysia Airlines
15 Jan - 20 Jan	Air China
18 Jan - 23 Jan	Air China
27 Jan - 30 Jan	Air China
26 Jan - 31 Jan	Air China
24 Jan - 11 Feb	Malaysia Airlines
28 Jan - 01 Feb	Air China
30 Jan - 12 Feb	Air China
27 Jan - 12 Feb	Air China
29 Jan - 12 Feb	Air China
14 Jan - 12 Feb	Air China

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 $294

Return flights