Cheapest return flights from Chicago to Helsinki in September from $664

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

Return flights

13 Sep - 17 Sep Turkish Airlines
28 Sep - 05 Oct Scandinavian Airlines
30 Sep - 07 Oct Scandinavian Airlines
18 Sep - 02 Oct Air France
12 Sep - 15 Sep Spirit Airlines
18 Sep - 22 Sep Spirit Airlines
10 Sep - 13 Sep Turkish Airlines
22 Sep - 29 Sep Scandinavian Airlines
04 Sep - 07 Sep Turkish Airlines
24 Sep - 01 Oct United
26 Sep - 03 Oct United
18 Sep - 25 Sep United

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

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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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