Cheapest return flights from Seoul to Bangkok in September from $104

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

Return flights

24 Sep - 02 Oct Jeju Air direct
24 Sep - 01 Oct Jeju Air direct
21 Sep - 02 Oct T'way Air direct
21 Sep - 29 Sep Jeju Air direct
21 Sep - 28 Sep Jeju Air direct
21 Sep - 25 Sep Jeju Air direct
24 Sep - 20 Oct Jeju Air direct
20 Sep - 01 Oct Jeju Air direct
21 Sep - 04 Oct Jeju Air direct
21 Sep - 03 Oct Jeju Air direct
24 Sep - 27 Sep T'way Air direct
21 Sep - 05 Oct T'way Air direct
21 Sep - 06 Oct T'way Air direct
20 Sep - 26 Sep Jeju Air direct
20 Sep - 02 Oct T'way Air direct
24 Sep - 28 Sep Eastar Jet direct
24 Sep - 29 Sep Eastar Jet direct
20 Sep - 27 Sep T'way Air direct
25 Sep - 28 Sep Jeju Air direct
22 Sep - 26 Sep Eastar Jet direct

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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