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

Return flights

23 Oct - 14 Nov	Iberia
23 Oct - 17 Nov	Iberia
29 Oct - 05 Nov	Iberia
21 Oct - 28 Oct	Iberia
19 Oct - 29 Oct	Iberia
25 Oct - 19 Nov	Iberia
23 Oct - 31 Oct	Qatar Airways
24 Oct - 07 Nov	Etihad Airways
01 Oct - 11 Oct	LOT
02 Oct - 10 Oct	Qatar Airways
01 Oct - 08 Oct	LOT
23 Oct - 18 Nov	Iberia
22 Oct - 16 Nov	Finnair
23 Oct - 03 Nov	Lufthansa
22 Oct - 02 Nov	Iberia
23 Oct - 16 Nov	Iberia
16 Oct - 27 Oct	Etihad Airways
02 Oct - 11 Oct	Iberia
01 Oct - 10 Oct	LOT
01 Oct - 22 Oct	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 $720

Return flights