Cheapest one-way flights from Seoul to Chiang Mai in September from $109

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

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

One-Way flights

17 Sep Jeju Air direct
06 Sep Eastar Jet direct
07 Sep Eastar Jet direct
27 Sep Eastar Jet direct
14 Sep Eastar Jet direct
28 Sep Jeju Air direct
13 Sep Eastar Jet direct
16 Sep Thai AirAsia X
24 Sep Thai AirAsia X
08 Sep Thai AirAsia X

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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