Cheapest return flights from Seoul to Chiang Mai in May from $181

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

Return flights

12 May - 16 May AirAsia X
10 May - 14 May AirAsia X
09 May - 21 May Jeju Air direct
09 May - 14 May Jeju Air direct
17 May - 20 May Jeju Air direct
17 May - 21 May Jeju Air direct
24 May - 28 May Jeju Air direct
09 May - 13 May Jeju Air direct
10 May - 14 May Jeju Air direct
16 May - 21 May Jeju Air direct
28 May - 11 Jun Eastar Jet direct
31 May - 05 Jun Thai AirAsia X
11 May - 10 Jun Thai AirAsia X
28 May - 13 Jun Eastar Jet direct
28 May - 14 Jun Eastar Jet direct
24 May - 11 Jun Eastar Jet direct
23 May - 11 Jun Eastar Jet direct
13 May - 12 Jun Thai VietJet Air
28 May - 10 Jun Eastar Jet direct
27 May - 11 Jun Eastar Jet direct

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

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