Cheapest return flights from Seoul to Chiang Mai in December from $289

AirHint found the following cheapest return flights from Seoul (ICN) to Chiang Mai (CNX) in December 2025 (see full year).

Return flights

29 Dec - 08 Jan Jin Air direct
29 Dec - 11 Jan Jeju Air direct
29 Dec - 07 Jan Jeju Air direct
29 Dec - 09 Jan Jeju Air direct
28 Dec - 08 Jan Jin Air direct
26 Dec - 06 Jan Jeju Air direct
29 Dec - 06 Jan Jeju Air direct
23 Dec - 25 Dec Jeju Air direct
22 Dec - 25 Dec Jin Air direct
22 Dec - 24 Dec Jin Air direct
29 Dec - 12 Jan Jeju Air direct
28 Dec - 05 Jan Eastar Jet direct
26 Dec - 09 Jan Jeju Air direct
29 Dec - 31 Dec Jeju Air direct
26 Dec - 31 Dec Jeju Air
26 Dec - 29 Dec Jeju Air direct
23 Dec - 27 Dec Jeju Air direct
23 Dec - 26 Dec Jeju Air direct
23 Dec - 29 Dec Jeju Air direct
27 Dec - 29 Dec Jeju Air direct

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

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