AirHint found the following cheapest return flights from Seoul (GMP) to Bangkok (BKK) in March 2026 (see full year).

Return flights

16 Mar - 23 Mar	Jeju Air
09 Mar - 13 Mar	Jeju Air
16 Mar - 20 Mar	Jeju Air
09 Mar - 20 Mar	Jeju Air
15 Mar - 18 Mar	Jeju Air
17 Mar - 20 Mar	Jeju Air
12 Mar - 16 Mar	Jeju Air
05 Mar - 10 Mar	Jeju Air
12 Mar - 17 Mar	Jeju Air
12 Mar - 18 Mar	Jeju Air
29 Mar - 02 Apr	Air China
27 Mar - 03 Apr	Air China

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

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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Cheapest return flights from Seoul to Bangkok in March from $426

Return flights