AirHint found the following cheapest one-way flights from Seoul (ICN) to Lisbon (LIS) in August 2025 (see full year).

One-Way flights

23 Aug	Etihad Airways
03 Aug	China Eastern
18 Aug	Etihad Airways
11 Aug	Asiana Airlines
05 Aug	Etihad Airways
27 Aug	Etihad Airways
26 Aug	Etihad Airways
12 Aug	Etihad Airways
22 Aug	Shenzhen Airlines
28 Aug	Shenzhen Airlines

Also check the deals for return flights from Seoul to Lisbon in August.

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 one-way flights from Seoul to Lisbon in August from $379

One-Way flights