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

Return flights

09 Apr - 16 Apr	Jeju Air
10 Apr - 19 Apr	Korean Air
11 Apr - 18 Apr	Korean Air
11 Apr - 16 Apr	Korean Air
10 Apr - 17 Apr	Korean Air
26 Apr - 01 May	Korean Air
10 Apr - 24 Apr	Korean Air
26 Apr - 29 Apr	Korean Air
11 Apr - 15 Apr	Korean Air
01 Apr - 06 May	EVA Air
01 Apr - 28 Apr	EVA Air
22 Apr - 28 Apr	EVA Air
29 Apr - 06 May	EVA Air
22 Apr - 06 May	EVA Air
29 Apr - 05 May	EVA Air
02 Apr - 06 May	Air China
29 Apr - 07 May	EVA Air
23 Apr - 04 May	Air China
29 Apr - 04 May	EVA Air
24 Apr - 01 May	EVA Air

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 251€

Return flights