AirHint found the following cheapest return flights from Philadelphia (PHL) to Dublin (DUB) in May 2026 (see full year).

Return flights

12 May - 20 May	Finnair	direct
04 May - 11 May	Aer Lingus	direct
11 May - 18 May	Lufthansa
20 May - 30 May	United
14 May - 21 May	Aer Lingus	direct
09 May - 16 May	Aer Lingus	direct
20 May - 30 May	Finnair	direct
29 May - 05 Jun	Aer Lingus	direct
28 May - 07 Jun	Aer Lingus	direct
19 May - 26 May	Aer Lingus
19 May - 24 May	United
08 May - 17 May	Aer Lingus	direct

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

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 May from 446€

Return flights