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

Return flights

01 Apr - 05 Apr	Korean Air
04 Apr - 06 Apr	Korean Air
03 Apr - 06 Apr	Korean Air
03 Apr - 05 Apr	Korean Air
04 Apr - 07 Apr	Korean Air
27 Apr - 01 May	Korean Air
13 Apr - 20 Apr	Korean Air
17 Apr - 22 Apr	Korean Air
11 Apr - 15 Apr	Korean Air
25 Apr - 28 Apr	EVA Air
11 Apr - 22 Apr	EVA Air
29 Apr - 06 May	EVA Air
29 Apr - 05 May	EVA Air
25 Apr - 05 May	EVA Air
25 Apr - 04 May	EVA Air
30 Apr - 10 May	Air China
30 Apr - 09 May	Air China
26 Apr - 03 May	Air China
30 Apr - 04 May	Air China
30 Apr - 03 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 $310

Return flights