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

Return flights

26 Oct - 01 Nov	China Eastern
30 Oct - 06 Nov	China Eastern
21 Oct - 20 Nov	Lufthansa
10 Oct - 14 Nov	Air France
22 Oct - 12 Nov	Air France
15 Oct - 12 Nov	Air France
31 Oct - 10 Nov	China Eastern
25 Oct - 31 Oct	China Eastern
15 Oct - 14 Nov	Air France
12 Oct - 05 Nov	China Eastern
15 Oct - 05 Nov	Air France
18 Oct - 24 Oct	China Eastern
14 Oct - 21 Oct	LOT
13 Oct - 24 Oct	LOT
20 Oct - 30 Oct	LOT
21 Oct - 27 Oct	LOT
21 Oct - 29 Oct	LOT
20 Oct - 29 Oct	LOT
15 Oct - 21 Oct	LOT
18 Oct - 25 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 $607

Return flights