Cheapest return flights from Seoul to Bangkok in September from $332

Best time to book flights for Seoul (GMP) to Bangkok (BKK) flights at AirHint

AirHint found the following cheapest return flights from Seoul (GMP) to Bangkok (BKK) in September 2025 (see full year).

Return flights

03 Sep - 10 Sep Jeju Air
04 Sep - 09 Sep Jeju Air
04 Sep - 10 Sep Jeju Air
09 Sep - 16 Sep Air China
04 Sep - 07 Sep Air China
07 Sep - 09 Sep Air China
18 Sep - 22 Sep Air China
10 Sep - 17 Sep Air China
14 Sep - 19 Sep Air China
18 Sep - 23 Sep Air China
27 Sep - 03 Oct Jeju Air
26 Sep - 15 Oct Jeju Air
26 Sep - 01 Oct EVA Air
27 Sep - 04 Oct Jeju Air
26 Sep - 03 Oct Jeju Air
25 Sep - 01 Oct Jeju Air
28 Sep - 01 Oct Jeju Air
28 Sep - 02 Oct Jeju Air
28 Sep - 04 Oct Jeju Air
05 Sep - 10 Oct EVA Air

Also check the deals for one-way flights from Seoul to Bangkok 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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