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

Return flights

04 Oct - 11 Oct	Air Busan
05 Oct - 12 Oct	Air China
30 Oct - 15 Nov	Japan Airlines
25 Oct - 03 Nov	Japan Airlines
07 Oct - 17 Oct	Japan Airlines
26 Oct - 30 Oct	Japan Airlines
26 Oct - 29 Oct	Japan Airlines
19 Oct - 29 Oct	Japan Airlines
21 Oct - 03 Nov	Japan Airlines
20 Oct - 29 Oct	Japan Airlines
23 Oct - 30 Oct	Japan Airlines
03 Oct - 30 Oct	Japan Airlines
26 Oct - 03 Nov	Japan Airlines
08 Oct - 08 Nov	Japan Airlines
16 Oct - 26 Oct	Japan Airlines
31 Oct - 02 Nov	Japan Airlines
26 Oct - 05 Nov	Japan Airlines
28 Oct - 04 Nov	Japan Airlines
29 Oct - 05 Nov	Japan Airlines
26 Oct - 04 Nov	Japan Airlines

Also check the deals for one-way flights from Seoul to Lisbon 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.

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Cheapest return flights from Seoul to Lisbon in October from 1296€

Return flights