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

Return flights

07 Dec - 14 Dec	Scandinavian Airlines
03 Dec - 10 Dec	Scandinavian Airlines
02 Dec - 09 Dec	Icelandair
12 Dec - 19 Dec	Icelandair
04 Dec - 15 Dec	Scandinavian Airlines
08 Dec - 15 Dec	Scandinavian Airlines
30 Dec - 06 Jan	Lufthansa
13 Dec - 20 Dec	Icelandair
18 Dec - 25 Dec	United
22 Dec - 29 Dec	United
28 Dec - 04 Jan	Scandinavian Airlines
23 Dec - 30 Dec	United
27 Dec - 03 Jan	Scandinavian Airlines

Also check the deals for one-way flights from Chicago 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 Chicago to Oslo in December from 339€

Return flights