Cheapest return flights from Seoul to Chiang Mai in September from $180

Best time to book flights for Seoul (ICN) to Chiang Mai (CNX) flights at AirHint

AirHint found the following cheapest return flights from Seoul (ICN) to Chiang Mai (CNX) in September 2025 (see full year).

Return flights

02 Sep - 17 Sep Jin Air direct
02 Sep - 10 Sep Jin Air direct
23 Sep - 25 Sep Jin Air direct
23 Sep - 30 Sep Jin Air direct
15 Sep - 25 Sep Jin Air direct
15 Sep - 17 Sep Jin Air direct
15 Sep - 30 Sep Jin Air direct
23 Sep - 01 Oct Jin Air direct
15 Sep - 01 Oct Jin Air direct
02 Sep - 07 Sep Jin Air direct
02 Sep - 14 Sep Jin Air direct
02 Sep - 19 Sep Jin Air direct
13 Sep - 01 Oct Jin Air direct
12 Sep - 01 Oct Jin Air direct
16 Sep - 01 Oct Jin Air direct
14 Sep - 01 Oct Jin Air direct
21 Sep - 01 Oct Jin Air direct
11 Sep - 01 Oct Jin Air direct
18 Sep - 01 Oct Jin Air direct
17 Sep - 01 Oct Jin Air direct

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

Skyscanner

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.

Book a cheap hotel in Chiang Mai

Cheap car rent in Chiang Mai