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

Return flights

13 Sep - 26 Sep	Air Canada
01 Sep - 12 Sep	Alaska Airlines
01 Sep - 08 Sep	Alaska Airlines
22 Sep - 29 Sep	Frontier Airlines
10 Sep - 17 Sep	United
22 Sep - 07 Oct	Frontier Airlines
16 Sep - 23 Sep	United
09 Sep - 20 Sep	SWISS
04 Sep - 11 Sep	United
07 Sep - 14 Sep	United
25 Sep - 02 Oct	United
19 Sep - 26 Sep	United
28 Sep - 05 Oct	United

Also check the deals for one-way flights from Phoenix 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 Phoenix to Zurich in September from $605

Return flights