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

Return flights

05 Dec - 12 Dec	Korean Air
06 Dec - 10 Dec	Air China
18 Dec - 26 Dec	Air China
19 Dec - 26 Dec	Air China
24 Dec - 27 Dec	Air China
04 Dec - 11 Dec	Air China
06 Dec - 11 Dec	Air China
10 Dec - 14 Dec	Air China
03 Dec - 08 Dec	Air China
05 Dec - 08 Dec	Air China
18 Dec - 03 Jan	Air China
24 Dec - 03 Jan	Air China
24 Dec - 04 Jan	Air China
25 Dec - 05 Jan	Air China
24 Dec - 01 Jan	Air China
31 Dec - 02 Jan	Air China
31 Dec - 05 Jan	Air China
29 Dec - 04 Jan	Air China
27 Dec - 02 Jan	Air China
20 Dec - 02 Jan	Air China

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

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 December from $374

Return flights