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

Return flights

05 Dec - 08 Dec	Icelandair
06 Dec - 13 Dec	Icelandair
02 Dec - 09 Dec	Icelandair
04 Dec - 11 Dec	Icelandair
08 Dec - 15 Dec	Scandinavian Airlines
03 Dec - 07 Dec	Lufthansa
10 Dec - 17 Dec	Icelandair
17 Dec - 10 Jan	Iberia
16 Dec - 06 Jan	Iberia
16 Dec - 07 Jan	Iberia
15 Dec - 22 Dec	Scandinavian Airlines
16 Dec - 10 Jan	Icelandair
16 Dec - 05 Jan	KLM
17 Dec - 31 Dec	Iberia
17 Dec - 28 Dec	Iberia
14 Dec - 03 Jan	TAP
31 Dec - 04 Jan	Scandinavian Airlines
16 Dec - 04 Jan	jetBlue
22 Dec - 03 Jan	Scandinavian Airlines
30 Dec - 06 Jan	Icelandair

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 335€

Return flights