AirHint found the following cheapest return flights from Washington (IAD) to Oslo (OSL) in December 2025 (see full year).

Return flights

25 Dec - 28 Dec	Scandinavian Airlines
31 Dec - 05 Jan	SWISS
24 Dec - 28 Dec	TAP
23 Dec - 28 Dec	KLM
26 Dec - 28 Dec	TAP
23 Dec - 30 Dec	KLM
23 Dec - 31 Dec	United
23 Dec - 01 Jan	Lufthansa
23 Dec - 05 Jan	Air Canada
23 Dec - 04 Jan	Frontier Airlines
26 Dec - 04 Jan	TAP
13 Dec - 20 Dec	Scandinavian Airlines
23 Dec - 03 Jan	Frontier Airlines
24 Dec - 03 Jan	TAP
18 Dec - 25 Dec	Scandinavian Airlines
23 Dec - 02 Jan	Turkish Airlines

Also check the deals for one-way flights from Washington to Oslo in December.

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 December from $1066

Return flights