Cheapest one-way flights from Seoul to Chiang Mai in September from $137

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

12 Sep Vietnam Airlines
13 Sep Vietnam Airlines
01 Sep Scoot Tigerair
15 Sep Scoot Tigerair
11 Sep AirAsia X
28 Sep Malaysia Airlines
30 Sep China Airlines
10 Sep AirAsia X
25 Sep AirAsia X
09 Sep 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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