AirHint found the following cheapest return flights from San Francisco (SFO) to Zurich (ZRH) in September 2025 (see full year).

Return flights

16 Sep - 23 Sep	Condor
10 Sep - 17 Sep	Condor
16 Sep - 25 Sep	Condor
07 Sep - 18 Sep	Condor
25 Sep - 15 Oct	Condor
08 Sep - 17 Sep	Condor
07 Sep - 23 Sep	Condor
10 Sep - 08 Oct	Condor
09 Sep - 23 Sep	Condor
05 Sep - 19 Sep	Condor
09 Sep - 16 Sep	Condor
29 Sep - 06 Oct	Condor
15 Sep - 29 Sep	Condor
22 Sep - 02 Oct	Condor
23 Sep - 04 Oct	Condor
15 Sep - 11 Oct	Turkish Airlines
11 Sep - 04 Oct	Condor
17 Sep - 11 Oct	Turkish Airlines
16 Sep - 11 Oct	Turkish Airlines
17 Sep - 11 Oct	SWISS	direct

Also check the deals for one-way flights from San Francisco 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 San Francisco to Zurich in September from 446€

Return flights