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

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

Return flights

19 Apr - 23 Apr AirAsia X
26 Apr - 30 Apr AirAsia X
23 Apr - 14 May Thai AirAsia X
23 Apr - 14 May Jeju Air direct
23 Apr - 25 Apr Jeju Air direct
18 Apr - 07 May Eastar Jet direct
04 Apr - 16 Apr Jeju Air direct
05 Apr - 22 Apr Jeju Air direct
05 Apr - 08 Apr Jeju Air direct
04 Apr - 09 Apr Jeju Air direct
26 Apr - 29 Apr Jeju Air direct
05 Apr - 16 Apr Jeju Air direct
04 Apr - 08 Apr Jeju Air direct
25 Apr - 06 May Thai AirAsia X
25 Apr - 14 May Eastar Jet direct
25 Apr - 13 May Eastar Jet direct
22 Apr - 09 May Jeju Air direct
25 Apr - 10 May Eastar Jet direct
25 Apr - 06 May Jeju Air direct
22 Apr - 07 May Eastar Jet direct

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

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