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

Return flights

30 Aug - 07 Sep	Japan Airlines
16 Aug - 31 Aug	Japan Airlines
16 Aug - 22 Aug	Japan Airlines
11 Aug - 16 Aug	Japan Airlines
11 Aug - 18 Aug	Japan Airlines
11 Aug - 20 Aug	Japan Airlines
16 Aug - 23 Aug	Japan Airlines
12 Aug - 21 Aug	Japan Airlines
16 Aug - 24 Aug	Japan Airlines
12 Aug - 17 Aug	Japan Airlines
12 Aug - 16 Aug	Japan Airlines
31 Aug - 11 Sep	Japan Airlines
31 Aug - 06 Sep	Japan Airlines
20 Aug - 07 Sep	Japan Airlines
30 Aug - 06 Sep	Japan Airlines
30 Aug - 10 Sep	Japan Airlines
30 Aug - 19 Sep	Japan Airlines
25 Aug - 03 Sep	Japan Airlines
24 Aug - 03 Sep	Japan Airlines
25 Aug - 05 Sep	Japan Airlines

Also check the deals for one-way 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 return flights from Seoul to Lisbon in August from $2280

Return flights