Cheapest return flights from Chiang Mai to Seoul in September from $403

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

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

Return flights

06 Sep - 25 Sep AirAsia
06 Sep - 23 Sep AirAsia
07 Sep - 25 Sep AirAsia
21 Sep - 25 Sep AirAsia
06 Sep - 13 Sep AirAsia
27 Sep - 18 Oct AirAsia
07 Sep - 23 Sep AirAsia
21 Sep - 23 Sep AirAsia
27 Sep - 17 Oct AirAsia
10 Sep - 25 Sep AirAsia
09 Sep - 25 Sep AirAsia
01 Sep - 07 Sep HK Express
25 Sep - 06 Oct AirAsia
27 Sep - 06 Oct AirAsia
25 Sep - 15 Oct AirAsia
27 Sep - 15 Oct AirAsia
25 Sep - 05 Oct AirAsia
26 Sep - 17 Oct AirAsia
27 Sep - 05 Oct AirAsia
21 Sep - 06 Oct AirAsia

Also check the deals for one-way flights from Chiang Mai to Seoul in September.

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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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