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

Return flights

13 Jun - 20 Jun	Air China
08 Jun - 20 Jun	Air China
15 Jun - 20 Jun	Air China
06 Jun - 09 Jun	EVA Air
22 Jun - 29 Jun	Air China
20 Jun - 27 Jun	Air China
18 Jun - 22 Jun	Air China
18 Jun - 29 Jun	Air China
20 Jun - 23 Jun	Air China
18 Jun - 23 Jun	Air China
30 Jun - 20 Jul	Air China
01 Jun - 01 Jul	Asiana Airlines
30 Jun - 04 Jul	Air China
27 Jun - 06 Jul	Air China
30 Jun - 03 Jul	EVA Air
30 Jun - 17 Jul	EVA Air
26 Jun - 03 Jul	EVA Air

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 370€

Return flights