AirHint found the following cheapest return flights from Lisbon (LIS) to Seoul (ICN) in October 2026 (see full year).

Return flights

07 Oct - 14 Oct	Finnair
14 Oct - 21 Oct	Finnair
06 Oct - 20 Oct	Finnair
25 Oct - 04 Nov	Etihad Airways
18 Oct - 04 Nov	Etihad Airways
25 Oct - 02 Nov	Etihad Airways
01 Oct - 12 Oct	Finnair
05 Oct - 19 Oct	Finnair
02 Oct - 14 Oct	Finnair
02 Oct - 15 Oct	Finnair
05 Oct - 20 Oct	Finnair
04 Oct - 19 Oct	Finnair
03 Oct - 15 Oct	Finnair
17 Oct - 03 Nov	Etihad Airways
17 Oct - 01 Nov	TAP
19 Oct - 02 Nov	TAP

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 $822

Return flights