AirHint found the following cheapest return flights from Seoul (GMP) to Bangkok (BKK) in October 2025 (see full year).

Return flights

15 Oct - 17 Oct	Eastar Jet
11 Oct - 16 Oct	T'way Air
12 Oct - 15 Oct	T'way Air
15 Oct - 21 Oct	Jeju Air
15 Oct - 22 Oct	Jeju Air
15 Oct - 29 Oct	Jeju Air
22 Oct - 29 Oct	Jeju Air
15 Oct - 18 Oct	Jeju Air
14 Oct - 15 Oct	Jeju Air
21 Oct - 28 Oct	Jeju Air
29 Oct - 02 Nov	Air China
15 Oct - 27 Nov	Jeju Air
28 Oct - 14 Nov	Air China
28 Oct - 04 Nov	Air China
29 Oct - 04 Nov	Air China
28 Oct - 05 Nov	Air China
29 Oct - 12 Nov	Air China
28 Oct - 09 Nov	Air China
29 Oct - 03 Nov	Air China
29 Oct - 05 Nov	Air China

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

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 October from 161€

Return flights