Cheapest return flights from Seoul to Chiang Mai in August from $217

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

Return flights

31 Aug - 18 Sep Eastar Jet direct
31 Aug - 11 Sep Eastar Jet direct
24 Aug - 27 Aug Vietnam Airlines
29 Aug - 18 Sep Eastar Jet direct
29 Aug - 11 Sep Eastar Jet direct
26 Aug - 11 Sep Eastar Jet direct
30 Aug - 18 Sep Eastar Jet direct
30 Aug - 11 Sep Eastar Jet direct
31 Aug - 10 Sep Eastar Jet direct
31 Aug - 04 Sep Eastar Jet direct
31 Aug - 17 Sep Eastar Jet direct
21 Aug - 28 Aug Eastar Jet
19 Aug - 25 Aug T'way Air
18 Aug - 23 Aug AirAsia X
26 Aug - 27 Aug Eastar Jet
26 Aug - 27 Aug Jeju Air direct
21 Aug - 24 Aug T'way Air
26 Aug - 28 Aug Eastar Jet direct
25 Aug - 27 Aug Jeju Air direct
17 Aug - 24 Aug Jeju Air direct

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

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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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