Cheapest return flights from Seoul to Chiang Mai in October from $206

Best time to book flights for Seoul (ICN) to Chiang Mai (CNX) flights at AirHint

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

Return flights

14 Oct - 22 Oct Jeju Air direct
14 Oct - 21 Oct Jeju Air direct
13 Oct - 22 Oct Jeju Air direct
13 Oct - 21 Oct Jeju Air direct
20 Oct - 22 Oct Jin Air direct
19 Oct - 22 Oct Jin Air direct
16 Oct - 22 Oct Jeju Air direct
15 Oct - 22 Oct Jeju Air direct
14 Oct - 17 Oct Jeju Air direct
11 Oct - 16 Oct Jeju Air direct
20 Oct - 04 Nov Jin Air
14 Oct - 04 Nov Jin Air
19 Oct - 04 Nov Jin Air
23 Oct - 13 Nov Jin Air
23 Oct - 04 Nov Jin Air
23 Oct - 10 Nov Jin Air
15 Oct - 04 Nov Jin Air
20 Oct - 10 Nov Jin Air
16 Oct - 04 Nov Jin Air
17 Oct - 04 Nov Jin Air

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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