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

Return flights

25 Aug - 08 Sep	Eurowings
29 Aug - 31 Aug	Eurowings
25 Aug - 31 Aug	Eurowings
27 Aug - 24 Sep	Lufthansa
25 Aug - 18 Sep	Lufthansa
25 Aug - 11 Sep	Eurowings
27 Aug - 16 Sep	Lufthansa
25 Aug - 09 Sep	Lufthansa
24 Aug - 05 Sep	Lufthansa
18 Aug - 26 Aug	Eurowings
14 Aug - 21 Aug	Eurowings
08 Aug - 29 Aug	Eurowings
31 Aug - 12 Sep	Lufthansa
06 Aug - 20 Aug	Eurowings
13 Aug - 27 Aug	Lufthansa
14 Aug - 28 Aug	Eurowings
11 Aug - 28 Aug	Lufthansa
06 Aug - 13 Aug	Lufthansa
21 Aug - 03 Sep	Lufthansa
24 Aug - 09 Sep	Lufthansa

Also check the deals for one-way flights from Duesseldorf 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 Duesseldorf to Seoul in August from $1018

Return flights