Cheapest return ICN–CNX flights, September

AirHint found the following cheapest return flights from Seoul (ICN) to Chiang Mai (CNX) in September 2026 (see full year).

Return flights

15 Sep - 19 Sep China Eastern
05 Sep - 10 Sep Thai AirAsia
05 Sep - 16 Sep Thai AirAsia
13 Sep - 16 Sep Eastar Jet direct
05 Sep - 10 Sep Eastar Jet direct
05 Sep - 16 Sep Eastar Jet direct
06 Sep - 10 Sep Eastar Jet direct
06 Sep - 16 Sep Eastar Jet direct
05 Sep - 07 Sep Malaysia Airlines
09 Sep - 15 Sep Thai VietJet Air
30 Sep - 06 Oct Thai VietJet Air
30 Sep - 17 Oct Thai VietJet Air
13 Sep - 01 Oct Eastar Jet direct
01 Sep - 24 Oct Malaysia Airlines
12 Sep - 01 Oct Eastar Jet direct
16 Sep - 01 Oct Eastar Jet direct
17 Sep - 01 Oct Eastar Jet direct
29 Sep - 26 Oct Thai AirAsia
28 Sep - 30 Oct Malaysia Airlines
01 Sep - 05 Oct Malaysia Airlines

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

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