Cheapest return flights from Seoul to Chiang Mai in September from 175€

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

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

Return flights

07 Sep - 12 Sep Jin Air direct
02 Sep - 11 Sep AirAsia X
02 Sep - 07 Sep AirAsia X
02 Sep - 14 Sep AirAsia X
28 Sep - 29 Sep Eastar Jet
01 Sep - 11 Sep Thai AirAsia X
03 Sep - 11 Sep Thai AirAsia X
08 Sep - 11 Sep Thai AirAsia X
06 Sep - 11 Sep Thai AirAsia X
03 Sep - 11 Sep Eastar Jet direct
28 Sep - 16 Oct Jeju Air direct
28 Sep - 01 Oct Jeju Air direct
28 Sep - 15 Oct Jeju Air direct
28 Sep - 22 Oct Jeju Air direct
09 Sep - 01 Oct Jeju Air direct
13 Sep - 01 Oct Jeju Air direct
28 Sep - 18 Oct Jeju Air direct
25 Sep - 15 Oct AirAsia X
29 Sep - 15 Oct Thai AirAsia X
28 Sep - 02 Oct Eastar Jet direct

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