AirHint found the following cheapest return flights from Seoul (GMP) to Chiang Mai (CNX) in September 2026 (see full year).
Return flights
| 07 Sep - 12 Sep | Air China | ||
| 14 Sep - 19 Sep | Air China | ||
| 28 Sep - 03 Oct | Air China | ||
| 19 Sep - 25 Sep | EVA Air | ||
| 19 Sep - 24 Sep | EVA Air | ||
| 11 Sep - 25 Sep | EVA Air | ||
| 16 Sep - 25 Sep | EVA Air | ||
| 24 Sep - 05 Oct | Air China |
Also check the deals for one-way flights from Seoul to Chiang Mai in September.
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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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