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

Return flights

22 May - 25 May	Jeju Air
21 May - 24 May	Korean Air
01 May - 09 May	Jeju Air
13 May - 19 May	EVA Air
30 May - 02 Jun	EVA Air
13 May - 20 May	EVA Air
09 May - 20 May	EVA Air
30 May - 03 Jun	EVA Air
15 May - 19 May	EVA Air
09 May - 12 May	EVA Air
08 May - 12 May	EVA Air
06 May - 12 May	EVA Air
29 May - 03 Jun	EVA Air
30 May - 06 Jun	Air China
28 May - 05 Jun	Air China
11 May - 19 Jun	Air China
31 May - 04 Jun	Air China
29 May - 07 Jun	Air China
29 May - 04 Jun	Air China
29 May - 05 Jun	Air China

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

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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Seoul to Bangkok in May from 268€

Return flights