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

Return flights

22 Oct - 29 Oct	Vueling Airlines
26 Oct - 09 Nov	easyJet
31 Oct - 03 Nov	easyJet
01 Oct - 18 Oct	Vueling Airlines
19 Oct - 23 Oct	Wizz Air Malta
16 Oct - 19 Oct	easyJet
20 Oct - 23 Oct	Ryanair
22 Oct - 25 Oct	easyJet
02 Oct - 15 Oct	Etihad Airways
02 Oct - 16 Oct	Etihad Airways
24 Oct - 10 Nov	Etihad Airways
01 Oct - 07 Oct	Air France
01 Oct - 08 Oct	Air France
29 Oct - 10 Nov	Finnair
26 Oct - 11 Nov	Lufthansa
31 Oct - 17 Nov	LOT
25 Oct - 11 Nov	LOT
25 Oct - 10 Nov	LOT
25 Oct - 08 Nov	LOT
29 Oct - 09 Nov	LOT

Also check the deals for one-way flights from Lisbon to Seoul 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 Lisbon to Seoul in October from 522€

Return flights