AirHint found the following cheapest return flights from Washington (IAD) to Oslo (OSL) in August 2026 (see full year).

Return flights

17 Aug - 24 Aug	Scandinavian Airlines
19 Aug - 26 Aug	Scandinavian Airlines
24 Aug - 31 Aug	Scandinavian Airlines
26 Aug - 02 Sep	Scandinavian Airlines
18 Aug - 25 Aug	Air France
16 Aug - 23 Aug	Air France
12 Aug - 19 Aug	Air France
13 Aug - 20 Aug	Air France
08 Aug - 19 Aug	KLM
14 Aug - 21 Aug	KLM
23 Aug - 30 Aug	Air France
25 Aug - 01 Sep	Air France
27 Aug - 03 Sep	Scandinavian Airlines
30 Aug - 06 Sep	Scandinavian Airlines
31 Aug - 07 Sep	Icelandair
28 Aug - 04 Sep	Air France
29 Aug - 05 Sep	Air France

Also check the deals for one-way flights from Washington 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 Washington to Oslo in August from 426€

Return flights