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

Return flights

04 Jul - 07 Jul	Air China
04 Jul - 11 Jul	Air China
09 Jul - 18 Jul	Air China
11 Jul - 14 Jul	Air China
18 Jul - 21 Jul	Air China
25 Jul - 01 Aug	Air China
06 Jul - 09 Jul	Air China
27 Jul - 30 Jul	Air China
28 Jul - 01 Aug	Air China
11 Jul - 18 Jul	Air China
25 Jul - 30 Jul	Air China
23 Jul - 30 Jul	Air China
20 Jul - 31 Aug	Air China
25 Jul - 11 Aug	Air China
25 Jul - 04 Aug	Air China
20 Jul - 03 Aug	Air China
16 Jul - 15 Aug	Air China
31 Jul - 04 Aug	EVA Air
29 Jul - 03 Aug	EVA Air

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

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 July from 475€

Return flights