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

Return flights

14 Sep - 30 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
23 Sep - 30 Sep	United
17 Sep - 24 Sep	United
10 Sep - 04 Oct	Air Canada
29 Sep - 06 Oct	Frontier Airlines
05 Sep - 12 Sep	United
11 Sep - 18 Sep	United
07 Sep - 14 Sep	United
13 Sep - 20 Sep	United
21 Sep - 28 Sep	United
19 Sep - 26 Sep	United
29 Sep - 03 Oct	Frontier Airlines
18 Sep - 05 Oct	Frontier Airlines

Also check the deals for one-way flights from Phoenix to Amsterdam 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 Amsterdam in September from 534€

Return flights