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

Return flights

25 Aug - 08 Sep	Finnair
26 Aug - 09 Sep	Finnair
30 Aug - 09 Sep	Etihad Airways
26 Aug - 06 Sep	Finnair
30 Aug - 06 Sep	Turkish Airlines
19 Aug - 30 Aug	Finnair
17 Aug - 28 Aug	Finnair
07 Aug - 17 Aug	Turkish Airlines
09 Aug - 19 Aug	Turkish Airlines
16 Aug - 27 Aug	Turkish Airlines
16 Aug - 28 Aug	Turkish Airlines
07 Aug - 26 Aug	Turkish Airlines
09 Aug - 23 Aug	Turkish Airlines
02 Aug - 16 Aug	Turkish Airlines
14 Aug - 04 Sep	Turkish Airlines
09 Aug - 14 Aug	Turkish Airlines

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 689€

Return flights