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

Return flights

25 Aug - 08 Sep	Air Europa
20 Aug - 07 Sep	TAP
31 Aug - 07 Sep	easyJet
19 Aug - 06 Sep	TAP
29 Aug - 05 Sep	TAP
29 Aug - 07 Sep	Wizz Air
26 Aug - 11 Sep	Ryanair
26 Aug - 02 Sep	Ryanair
30 Aug - 13 Sep	Vueling Airlines
26 Aug - 10 Sep	Ryanair
27 Aug - 29 Aug	Air Europa
18 Aug - 27 Aug	TAP
20 Aug - 27 Aug	Wizz Air
16 Aug - 23 Aug	Turkish Airlines
13 Aug - 18 Aug	Finnair
22 Aug - 30 Aug	TAP
27 Aug - 31 Aug	Air Europa
20 Aug - 31 Aug	Vueling Airlines
18 Aug - 26 Aug	easyJet
23 Aug - 31 Aug	Iberia

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 735€

Return flights