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

Return flights

31 Jul - 04 Aug	LOT
31 Jul - 08 Aug	LOT
27 Jul - 28 Jul	Finnair
30 Jul - 06 Aug	LOT
20 Jul - 23 Jul	Finnair
22 Jul - 21 Aug	Finnair
22 Jul - 10 Aug	Lufthansa
26 Jul - 28 Jul	LOT
27 Jul - 04 Aug	Finnair
27 Jul - 11 Aug	Finnair
30 Jul - 03 Aug	KLM
24 Jul - 31 Jul	Finnair
22 Jul - 28 Jul	Finnair
26 Jul - 30 Jul	Finnair
29 Jul - 05 Aug	Finnair
20 Jul - 21 Jul	Finnair
30 Jul - 04 Aug	LOT
22 Jul - 27 Jul	Lufthansa
20 Jul - 25 Jul	Finnair
20 Jul - 27 Jul	Finnair

Also check the deals for one-way flights from Duesseldorf to Oslo 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 Oslo in July from $303

Return flights