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

Return flights

27 Sep - 18 Oct	Scandinavian Airlines
15 Sep - 29 Sep	Condor
05 Sep - 19 Sep	Condor
26 Sep - 18 Oct	Frontier Airlines
09 Sep - 16 Sep	United
17 Sep - 24 Sep	United
23 Sep - 30 Sep	United
04 Sep - 18 Sep	Condor
05 Sep - 12 Sep	United
11 Sep - 18 Sep	United
07 Sep - 14 Sep	United
13 Sep - 20 Sep	United
25 Sep - 02 Oct	United
29 Sep - 06 Oct	United
27 Sep - 04 Oct	United

Also check the deals for one-way flights from San Diego 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 Diego to Zurich in September from 586€

Return flights