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

Return flights

01 Dec - 08 Dec	Scandinavian Airlines
01 Dec - 05 Dec	Scandinavian Airlines
06 Dec - 13 Dec	Icelandair
05 Dec - 14 Dec	Icelandair
03 Dec - 10 Dec	Icelandair
09 Dec - 16 Dec	Icelandair
12 Dec - 19 Dec	Icelandair
17 Dec - 24 Dec	Scandinavian Airlines
17 Dec - 22 Dec	Lufthansa
29 Dec - 03 Jan	Scandinavian Airlines
22 Dec - 29 Dec	Scandinavian Airlines
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 336€

Return flights