Cheapest return flights from Chicago to Oslo in September from 383€

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

Return flights

29 Sep - 06 Oct Icelandair
08 Sep - 15 Sep Icelandair
18 Sep - 25 Sep Icelandair
02 Sep - 09 Sep United
04 Sep - 11 Sep United
14 Sep - 21 Sep United
23 Sep - 30 Sep United
16 Sep - 23 Sep United
26 Sep - 03 Oct United
12 Sep - 20 Sep KLM
12 Sep - 19 Sep Icelandair
20 Sep - 27 Sep Scandinavian Airlines

Also check the deals for one-way flights from Chicago to Oslo in September.

Skyscanner

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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