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

Return flights

25 Oct - 08 Nov	Ryanair
22 Oct - 26 Oct	easyJet
22 Oct - 03 Nov	easyJet
17 Oct - 26 Oct	easyJet
26 Oct - 11 Nov	easyJet
03 Oct - 13 Oct	Ryanair
22 Oct - 30 Oct	easyJet
01 Oct - 16 Oct	Ryanair
31 Oct - 18 Nov	easyJet
20 Oct - 28 Oct	easyJet
24 Oct - 05 Nov	TAP
31 Oct - 14 Nov	Vueling Airlines
01 Oct - 16 Nov	Ryanair
13 Oct - 16 Oct	easyJet
19 Oct - 23 Oct	easyJet
01 Oct - 13 Oct	Ryanair
25 Oct - 31 Oct	Iberia
29 Oct - 16 Nov	Vueling Airlines
02 Oct - 16 Nov	easyJet
21 Oct - 05 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 $630

Return flights