Cheapest return flights from Chicago to Oslo in September from 381€

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

Return flights

01 Sep - 17 Sep Icelandair
18 Sep - 25 Sep Icelandair
29 Sep - 06 Oct Scandinavian Airlines
01 Sep - 22 Sep Lufthansa
01 Sep - 08 Sep Lufthansa
08 Sep - 15 Sep Lufthansa
22 Sep - 04 Oct Scandinavian Airlines
09 Sep - 16 Sep Austrian Airlines
04 Sep - 11 Sep United
15 Sep - 11 Oct British Airways
16 Sep - 23 Sep United
23 Sep - 30 Sep United
15 Sep - 20 Sep British Airways

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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