Cheapest return flights from Seoul to Bangkok in September from $140

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

Return flights

01 Sep - 08 Sep Vietnam Airlines
25 Sep - 29 Sep Vietnam Airlines
04 Sep - 07 Sep Vietnam Airlines
01 Sep - 05 Sep Vietnam Airlines
16 Sep - 28 Sep Vietnam Airlines
13 Sep - 14 Sep Vietnam Airlines
01 Sep - 07 Sep Vietnam Airlines
05 Sep - 07 Sep Vietnam Airlines
10 Sep - 13 Sep Vietnam Airlines
03 Sep - 10 Sep Thai AirAsia X direct
22 Sep - 03 Oct Vietnam Airlines
29 Sep - 14 Oct Vietnam Airlines
26 Sep - 03 Oct Vietnam Airlines
16 Sep - 01 Oct Vietnam Airlines
24 Sep - 14 Oct Vietnam Airlines
25 Sep - 14 Oct Vietnam Airlines
24 Sep - 01 Oct Vietnam Airlines
21 Sep - 17 Oct Vietnam Airlines
16 Sep - 19 Oct Vietnam Airlines
21 Sep - 03 Oct Vietnam Airlines

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

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