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

Return flights

29 Apr - 04 May	EVA Air
24 Apr - 28 Apr	EVA Air
28 Apr - 06 May	EVA Air
13 Apr - 19 Apr	Air China
10 Apr - 14 Apr	EVA Air
03 Apr - 07 Apr	EVA Air
01 Apr - 27 Apr	EVA Air
17 Apr - 21 Apr	EVA Air
12 Apr - 16 Apr	Air China
04 Apr - 18 Apr	Air China
16 Apr - 21 Apr	Air China
04 Apr - 06 Apr	Air China
28 Apr - 07 May	EVA Air
29 Apr - 02 May	Air China
26 Apr - 01 May	Air China
30 Apr - 03 May	Air China
30 Apr - 06 May	Air China
30 Apr - 05 May	Air China
30 Apr - 04 May	Air China

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

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 April from 405€

Return flights