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

Return flights

26 Oct - 05 Nov	China Eastern
28 Oct - 06 Nov	China Eastern
22 Oct - 20 Nov	Air France
24 Oct - 12 Nov	Air France
15 Oct - 12 Nov	Air France
24 Oct - 11 Nov	Air France
15 Oct - 13 Nov	Air France
28 Oct - 03 Nov	LOT
28 Oct - 04 Nov	China Eastern
24 Oct - 09 Nov	Air France
20 Oct - 31 Oct	Air China
20 Oct - 27 Oct	LOT
22 Oct - 31 Oct	Air China
26 Oct - 31 Oct	Etihad Airways
23 Oct - 31 Oct	Air China
18 Oct - 23 Oct	Etihad Airways
21 Oct - 31 Oct	Air France
18 Oct - 31 Oct	Air France
22 Oct - 29 Oct	Air France
21 Oct - 29 Oct	LOT

Also check the deals for one-way flights from Seoul to Lisbon 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 Seoul to Lisbon in October from 574€

Return flights