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

Return flights

21 Jan - 26 Jan	Air China
13 Jan - 16 Jan	Air China
06 Jan - 13 Jan	Air China
20 Jan - 24 Jan	Air China
13 Jan - 24 Jan	Air China
13 Jan - 19 Jan	Air China
13 Jan - 17 Jan	Air China
16 Jan - 19 Jan	Air China
20 Jan - 27 Jan	Air China
05 Jan - 30 Jan	Air China
30 Jan - 04 Feb	EVA Air
21 Jan - 04 Feb	EVA Air
30 Jan - 03 Feb	EVA Air
11 Jan - 05 Feb	Jeju Air
26 Jan - 04 Feb	Jeju Air
31 Jan - 05 Feb	Jeju Air
30 Jan - 02 Feb	EVA Air
07 Jan - 13 Feb	Jeju Air
02 Jan - 09 Feb	EVA Air
29 Jan - 05 Feb	Jeju Air

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

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 January from 437€

Return flights