Cheapest return ICN–CNX flights, May

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

Return flights

30 May - 31 May Eastar Jet direct
28 May - 30 May Eastar Jet direct
31 May - 04 Jun Jeju Air direct
26 May - 28 May China Eastern
23 May - 28 May Shandong Airlines
23 May - 04 Jun Shandong Airlines
23 May - 05 Jun China Eastern
27 May - 31 May Eastar Jet direct
27 May - 30 May Eastar Jet direct
23 May - 07 Jun China Eastern
24 May - 04 Jun Jeju Air direct
31 May - 07 Jun Jeju Air direct
28 May - 07 Jun Jeju Air direct
26 May - 01 Jun Jin Air direct
26 May - 30 May Jin Air direct
23 May - 04 Jun Air Busan direct
26 May - 29 May Jin Air direct
23 May - 28 May Air Busan direct
21 May - 30 May Eastar Jet direct
28 May - 25 Jun Jeju Air direct

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

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