Cheapest one-way flights from Seoul to Chiang Mai in September from $118

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

One-Way flights

27 Sep Jeju Air
23 Sep Eastar Jet
23 Sep Jin Air direct
26 Sep Thai AirAsia X
28 Sep Jeju Air
22 Sep Jin Air direct
28 Sep Eastar Jet direct
30 Sep VietJet Air
19 Sep Jin Air direct
26 Sep Jin 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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