AirHint found the following cheapest return flights from Denver (DEN) to Oslo (OSL) in August 2025 (see full year).

Return flights

17 Aug - 24 Aug	Icelandair
09 Aug - 13 Aug	Icelandair
13 Aug - 23 Aug	Icelandair
09 Aug - 17 Aug	Icelandair
05 Aug - 13 Aug	British Airways
07 Aug - 17 Aug	Air France
07 Aug - 18 Aug	Air France
09 Aug - 18 Aug	Delta
09 Aug - 16 Aug	Delta
08 Aug - 16 Aug	Frontier Airlines

Also check the deals for one-way flights from Denver to Oslo 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 Denver to Oslo in August from 364€

Return flights