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

Return flights

01 Oct - 13 Oct	Ryanair
03 Oct - 12 Oct	easyJet
26 Oct - 11 Nov	easyJet
03 Oct - 13 Oct	easyJet
01 Oct - 16 Oct	Ryanair
29 Oct - 12 Nov	Wizz Air Malta
20 Oct - 28 Oct	easyJet
18 Oct - 25 Oct	Ryanair
28 Oct - 31 Oct	Ryanair
01 Oct - 16 Nov	Ryanair
19 Oct - 23 Oct	easyJet
31 Oct - 09 Nov	Ryanair
25 Oct - 31 Oct	Iberia
01 Oct - 15 Oct	easyJet
02 Oct - 16 Nov	Ryanair
31 Oct - 14 Nov	Ryanair
29 Oct - 16 Nov	Finnair
28 Oct - 11 Nov	Air France
21 Oct - 05 Nov	SWISS
24 Oct - 09 Nov	SWISS

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 556€

Return flights