Cheapest return flights from St. Louis to Zurich in September from $719

AirHint found the following cheapest return flights from St. Louis (STL) to Zurich (ZRH) in September 2025 (see full year).

Return flights

10 Sep - 17 Sep United
22 Sep - 06 Oct Scandinavian Airlines
04 Sep - 11 Sep United
16 Sep - 23 Sep United
01 Sep - 08 Sep United
07 Sep - 14 Sep United
13 Sep - 20 Sep United
25 Sep - 02 Oct United
22 Sep - 29 Sep United
26 Sep - 04 Oct Air Canada
19 Sep - 26 Sep United

Also check the deals for one-way flights from St. Louis to Zurich 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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