Cheapest one-way flights from Seoul to Chiang Mai in September from $83

AirHint found the following cheapest one-way flights from Seoul (ICN) to Chiang Mai (CNX) in September 2025 (see full year).

One-Way flights

13 Sep Jeju Air direct
15 Sep Jeju Air direct
14 Sep Jeju Air direct
03 Sep Jin Air direct
08 Sep Jeju Air direct
07 Sep Jeju Air direct
09 Sep Jeju Air direct
23 Sep Jeju Air direct
02 Sep Jeju Air direct
06 Sep Jeju Air direct

Also check the deals for return flights from Seoul to Chiang Mai in September.

Skyscanner

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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