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

Return flights

25 Aug - 05 Sep	jetBlue
22 Aug - 25 Aug	jetBlue
26 Aug - 02 Sep	jetBlue
18 Aug - 25 Aug	jetBlue
12 Aug - 22 Aug	jetBlue
30 Aug - 10 Sep	jetBlue
13 Aug - 21 Aug	Aer Lingus	direct
25 Aug - 05 Sep	Aer Lingus	direct
26 Aug - 02 Sep	Aer Lingus	direct
19 Aug - 28 Aug	United
20 Aug - 29 Aug	Air Canada
12 Aug - 21 Aug	Air Canada
27 Aug - 03 Sep	United
12 Aug - 21 Aug	Aer Lingus	direct
05 Aug - 15 Aug	jetBlue
31 Aug - 14 Sep	Air Canada
12 Aug - 15 Aug	Aer Lingus	direct
27 Aug - 03 Sep	Aer Lingus	direct
30 Aug - 10 Sep	Aer Lingus	direct
31 Aug - 14 Sep	Aer Lingus	direct

Also check the deals for one-way flights from Philadelphia 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 Philadelphia to Dublin in August from $507

Return flights