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

Return flights

31 Jul - 06 Aug	LOT
30 Jul - 06 Aug	Finnair
31 Jul - 05 Aug	LOT
31 Jul - 08 Aug	LOT
31 Jul - 16 Aug	LOT
31 Jul - 03 Aug	LOT
30 Jul - 04 Aug	Finnair
27 Jul - 06 Aug	Finnair
29 Jul - 05 Aug	Lufthansa
29 Jul - 09 Aug	Lufthansa
27 Jul - 30 Jul	Finnair
27 Jul - 31 Jul	Lufthansa
30 Jul - 30 Jul	Lufthansa
27 Jul - 29 Jul	Finnair
28 Jul - 31 Jul	SWISS
28 Jul - 30 Jul	SWISS
29 Jul - 31 Jul	Scandinavian Airlines	direct
27 Jul - 31 Jul	Scandinavian Airlines	direct
28 Jul - 31 Jul	Norwegian	direct
27 Jul - 30 Jul	Scandinavian Airlines	direct

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 261€

Return flights