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

Return flights

22 Aug - 03 Sep	Eurowings	direct
20 Aug - 09 Sep	Ryanair
20 Aug - 05 Sep	Ryanair	direct
24 Aug - 09 Sep	Ryanair
15 Aug - 03 Sep	Ryanair
24 Aug - 10 Sep	Ryanair
24 Aug - 12 Sep	Ryanair	direct
15 Aug - 03 Sep	Ryanair	direct
24 Aug - 03 Sep	Ryanair
24 Aug - 11 Sep	Ryanair
20 Aug - 31 Aug	Ryanair
25 Aug - 31 Aug	Ryanair
13 Aug - 31 Aug	Ryanair
19 Aug - 27 Aug	Eurowings
13 Aug - 27 Aug	Ryanair
19 Aug - 26 Aug	Eurowings
27 Aug - 31 Aug	Ryanair
20 Aug - 27 Aug	Ryanair
22 Aug - 27 Aug	Eurowings
15 Aug - 27 Aug	Ryanair

Also check the deals for one-way flights from Duesseldorf to Porto 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 Porto in August from 126€

Return flights