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

Return flights

18 Jun - 22 Jun	AirAsia X
24 Jun - 28 Jun	AirAsia X
18 Jun - 23 Jun	AirAsia X
21 Jun - 25 Jun	AirAsia X
25 Jun - 30 Jun	AirAsia X
09 Jun - 20 Jun	AirAsia X
27 Jun - 30 Jun	AirAsia X
18 Jun - 25 Jun	AirAsia X
14 Jun - 28 Jun	AirAsia X
11 Jun - 13 Jun	AirAsia X
27 Jun - 04 Jul	AirAsia X
25 Jun - 11 Jul	AirAsia X
27 Jun - 01 Jul	Jeju Air	direct
17 Jun - 01 Jul	Jeju Air	direct
29 Jun - 03 Jul	Thai AirAsia X
26 Jun - 04 Jul	Thai AirAsia X
25 Jun - 11 Jul	Jeju Air	direct
13 Jun - 02 Jul	Eastar Jet	direct
21 Jun - 02 Jul	Eastar Jet	direct
14 Jun - 02 Jul	Eastar Jet	direct

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

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

Return flights