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

Return flights

19 Aug - 26 Aug	American Airlines
24 Aug - 04 Sep	Frontier Airlines
27 Aug - 03 Sep	Frontier Airlines
28 Aug - 05 Sep	Delta
28 Aug - 02 Sep	Delta
26 Aug - 03 Sep	Frontier Airlines
20 Aug - 27 Aug	Frontier Airlines
23 Aug - 25 Aug	Frontier Airlines
28 Aug - 06 Sep	United
18 Aug - 24 Aug	Allegiant Air

Also check the deals for one-way flights from Phoenix to Dublin in August.

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 August from 626€

Return flights