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

Return flights

30 Jul - 06 Aug	Frontier Airlines
30 Jul - 12 Aug	jetBlue
27 Jul - 31 Jul	jetBlue
31 Jul - 06 Aug	Frontier Airlines
31 Jul - 07 Aug	Frontier Airlines
28 Jul - 02 Aug	Spirit Airlines
27 Jul - 31 Jul	Iberia	direct
29 Jul - 30 Jul	Frontier Airlines
30 Jul - 06 Aug	Finnair	direct
31 Jul - 06 Aug	Aer Lingus	direct
31 Jul - 07 Aug	Aer Lingus	direct
30 Jul - 12 Aug	Aer Lingus	direct
28 Jul - 02 Aug	Aer Lingus	direct
29 Jul - 30 Jul	Aer Lingus	direct

Also check the deals for one-way flights from Philadelphia to Dublin in July.

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 July from 598€

Return flights