Cheapest return flights from Seoul to Chiang Mai in September from $201

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

Return flights

06 Sep - 10 Sep Eastar Jet direct
06 Sep - 09 Sep Eastar Jet direct
05 Sep - 10 Sep Eastar Jet direct
05 Sep - 09 Sep Eastar Jet direct
03 Sep - 10 Sep Eastar Jet direct
03 Sep - 09 Sep Eastar Jet direct
02 Sep - 10 Sep Eastar Jet direct
02 Sep - 09 Sep Eastar Jet direct
02 Sep - 03 Sep Eastar Jet direct
09 Sep - 10 Sep Eastar Jet direct
30 Sep - 03 Oct Thai AirAsia
13 Sep - 24 Oct Eastar Jet direct
25 Sep - 02 Oct Thai AirAsia
27 Sep - 04 Oct Thai AirAsia
30 Sep - 15 Oct Eastar Jet direct
27 Sep - 15 Oct Eastar Jet direct
28 Sep - 02 Oct VietJet Air
27 Sep - 02 Oct Thai VietJet Air
28 Sep - 23 Oct VietJet Air
30 Sep - 17 Oct Eastar Jet direct

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

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