AirHint found the following cheapest return flights from Chicago (ORD) to Zurich (ZRH) in September 2026 (see full year).

Return flights

14 Sep - 21 Sep	Scandinavian Airlines
12 Sep - 24 Sep	Scandinavian Airlines
03 Sep - 17 Sep	Scandinavian Airlines
01 Sep - 08 Sep	Scandinavian Airlines
02 Sep - 10 Sep	Scandinavian Airlines
16 Sep - 26 Sep	Scandinavian Airlines
01 Sep - 08 Sep	SWISS	direct
02 Sep - 10 Sep	SWISS	direct
03 Sep - 17 Sep	SWISS	direct
14 Sep - 21 Sep	SWISS	direct

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

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 Zurich in September from 422€

Return flights