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

Return flights

20 Mar - 22 Mar	Air China
06 Mar - 11 Mar	Air China
08 Mar - 14 Mar	Air China
11 Mar - 17 Mar	Air China
13 Mar - 18 Mar	Air China
18 Mar - 20 Mar	Air China
11 Mar - 12 Mar	Air China
10 Mar - 18 Mar	Air China
11 Mar - 14 Mar	Air China
13 Mar - 15 Mar	Air China
31 Mar - 05 Apr	Korean Air
30 Mar - 02 Apr	Peach
21 Mar - 18 Apr	Air China
27 Mar - 01 Apr	EVA Air
06 Mar - 27 Apr	EVA Air
31 Mar - 06 Apr	Air China
25 Mar - 01 Apr	Air China
26 Mar - 01 Apr	Air China
19 Mar - 20 Apr	Air China
31 Mar - 07 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 $290

Return flights