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

Return flights

03 Sep - 10 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
02 Sep - 09 Sep	Air Canada
09 Sep - 16 Sep	Air Canada
17 Sep - 24 Sep	Air Canada
16 Sep - 23 Sep	United
30 Sep - 07 Oct	United
05 Sep - 12 Sep	Air Canada
12 Sep - 19 Sep	Air Canada
04 Sep - 11 Sep	United
11 Sep - 18 Sep	United
29 Sep - 06 Oct	Frontier Airlines
26 Sep - 03 Oct	Frontier Airlines
27 Sep - 04 Oct	Frontier Airlines
28 Sep - 05 Oct	Air Canada
25 Sep - 02 Oct	Air Canada
22 Sep - 13 Oct	Air Canada

Also check the deals for one-way flights from Phoenix to Dublin 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 Dublin in September from $491

Return flights