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

Return flights

30 Jul - 03 Aug	Ryanair
30 Jul - 06 Aug	Ryanair
31 Jul - 05 Aug	KLM
31 Jul - 07 Aug	KLM
31 Jul - 02 Aug	KLM
29 Jul - 07 Aug	KLM
28 Jul - 06 Aug	Eurowings
30 Jul - 07 Aug	KLM
30 Jul - 06 Aug	Ryanair	direct
29 Jul - 05 Aug	KLM
28 Jul - 31 Jul	KLM
27 Jul - 30 Jul	KLM
28 Jul - 29 Jul	Eurowings
27 Jul - 31 Jul	KLM
27 Jul - 28 Jul	Condor
30 Jul - 30 Jul	Ryanair
27 Jul - 30 Jul	Eurowings	direct
29 Jul - 29 Jul	Vueling Airlines
27 Jul - 31 Jul	Eurowings	direct
27 Jul - 28 Jul	Eurowings	direct

Also check the deals for one-way flights from Duesseldorf to Porto in July.

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 July from 248€

Return flights