Cheapest return flights from Chiang Mai to Seoul in September from $199

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

Return flights

17 Sep - 24 Sep Jin Air direct
30 Sep - 12 Oct Jin Air direct
30 Sep - 15 Oct Jin Air direct
30 Sep - 09 Oct Jin Air direct
30 Sep - 11 Oct Jin Air direct
07 Sep - 08 Sep Jin Air direct
07 Sep - 09 Sep Jin Air direct
18 Sep - 24 Sep Eastar Jet direct
11 Sep - 17 Sep Eastar Jet direct
11 Sep - 14 Sep Eastar Jet direct
11 Sep - 24 Sep Eastar Jet direct
17 Sep - 18 Sep Jin Air direct
17 Sep - 20 Sep Jin Air direct
17 Sep - 21 Sep Jin Air direct
18 Sep - 09 Oct Eastar Jet direct
24 Sep - 12 Oct Jin Air direct
24 Sep - 15 Oct Jin Air direct
24 Sep - 09 Oct Jin Air direct
24 Sep - 11 Oct Jin Air direct
30 Sep - 10 Oct Jin Air direct

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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