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

Return flights

24 Oct - 09 Nov	Air China
14 Oct - 16 Oct	Air China
12 Oct - 15 Oct	Air China
16 Oct - 24 Oct	Japan Airlines
27 Oct - 12 Nov	Japan Airlines
27 Oct - 11 Nov	Japan Airlines
27 Oct - 22 Nov	Japan Airlines
16 Oct - 19 Oct	Japan Airlines
16 Oct - 25 Oct	Japan Airlines
08 Oct - 12 Oct	Japan Airlines
27 Oct - 03 Nov	Japan Airlines
27 Oct - 05 Nov	Japan Airlines
27 Oct - 10 Nov	Japan Airlines
22 Oct - 09 Nov	Japan Airlines
12 Oct - 26 Oct	Japan Airlines
28 Oct - 12 Nov	Japan Airlines
29 Oct - 12 Nov	Japan Airlines
10 Oct - 19 Oct	Japan Airlines
21 Oct - 29 Oct	Japan Airlines
08 Oct - 19 Oct	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 655€

Return flights