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

Return flights

30 Aug - 09 Sep	Lufthansa
23 Aug - 09 Sep	Lufthansa
28 Aug - 09 Sep	Lufthansa
12 Aug - 26 Aug	Finnair
21 Aug - 09 Sep	Finnair
21 Aug - 30 Aug	Turkish Airlines
28 Aug - 30 Aug	Turkish Airlines
23 Aug - 30 Aug	Turkish Airlines
04 Aug - 11 Aug	Finnair
14 Aug - 22 Aug	Turkish Airlines
15 Aug - 21 Aug	Turkish Airlines
31 Aug - 10 Sep	Emirates

Also check the deals for one-way flights from Lisbon to Seoul 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 return flights from Lisbon to Seoul in August from 718€

Return flights