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

Return flights

01 Feb - 09 Feb	Air Busan
10 Feb - 15 Feb	Air Busan
02 Feb - 09 Feb	Air Busan
01 Feb - 07 Feb	Air Busan
01 Feb - 08 Feb	Air Busan
05 Feb - 10 Feb	Air China
08 Feb - 14 Feb	Air Busan
18 Feb - 27 Feb	Jin Air
27 Feb - 04 Mar	Jin Air
04 Feb - 05 Feb	Air China
15 Feb - 19 Feb	Jin Air
26 Feb - 01 Mar	Air China
27 Feb - 03 Mar	Air China
28 Feb - 01 Mar	Air China
26 Feb - 03 Mar	Air China
26 Feb - 04 Mar	Air China
28 Feb - 08 Mar	Air China
04 Feb - 06 Mar	Air China
02 Feb - 03 Mar	Air China
04 Feb - 04 Mar	Air China

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 199€

Return flights