Cheapest return flights from Seoul to Chiang Mai in October from $142

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

Return flights

16 Oct - 22 Oct Jeju Air direct
12 Oct - 22 Oct Jeju Air direct
12 Oct - 18 Oct Jeju Air direct
22 Oct - 24 Oct Jeju Air direct
13 Oct - 17 Oct Jeju Air direct
19 Oct - 24 Oct Jeju Air direct
17 Oct - 18 Oct Jeju Air direct
20 Oct - 24 Oct Jeju Air direct
18 Oct - 24 Oct Jeju Air direct
12 Oct - 17 Oct Jeju Air direct
16 Oct - 13 Nov Jeju Air direct
20 Oct - 20 Nov Jeju Air
13 Oct - 13 Nov Jeju Air direct
13 Oct - 10 Nov Jeju Air direct
24 Oct - 21 Nov Jeju Air direct
13 Oct - 12 Nov Jin Air direct
10 Oct - 03 Nov Jeju Air direct
15 Oct - 14 Nov Jeju Air direct
12 Oct - 01 Nov Eastar Jet direct
16 Oct - 01 Nov Eastar Jet direct

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

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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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