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

Return flights

03 Dec - 10 Dec	Icelandair
09 Dec - 14 Dec	Icelandair
07 Dec - 14 Dec	Icelandair
02 Dec - 09 Dec	Icelandair
07 Dec - 18 Dec	Icelandair
08 Dec - 18 Dec	Icelandair
10 Dec - 17 Dec	Icelandair
14 Dec - 21 Dec	Icelandair
24 Dec - 30 Dec	Icelandair
24 Dec - 31 Dec	Icelandair
31 Dec - 07 Jan	Scandinavian Airlines
08 Dec - 03 Jan	TAP
10 Dec - 03 Jan	TAP
24 Dec - 01 Jan	British Airways
18 Dec - 10 Jan	Scandinavian Airlines
25 Dec - 01 Jan	Scandinavian Airlines
29 Dec - 05 Jan	Scandinavian Airlines
19 Dec - 03 Jan	Aer Lingus
26 Dec - 02 Jan	Icelandair

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 $395

Return flights