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

Return flights

22 Aug - 02 Sep	Lufthansa
17 Aug - 31 Aug	Etihad Airways
30 Aug - 11 Sep	Finnair
18 Aug - 29 Aug	Finnair
18 Aug - 30 Aug	Finnair
18 Aug - 31 Aug	Finnair
18 Aug - 25 Aug	Finnair
17 Aug - 29 Aug	Finnair
05 Aug - 19 Aug	Finnair
19 Aug - 26 Aug	Finnair
16 Aug - 30 Aug	Finnair
16 Aug - 29 Aug	Finnair

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 715€

Return flights