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

Return flights

05 May - 19 May	Aer Lingus
12 May - 28 May	Aer Lingus
07 May - 17 May	jetBlue
08 May - 15 May	Frontier Airlines
05 May - 12 May	Discover Airlines	direct
10 May - 14 Jun	Aer Lingus
08 May - 15 May	United	direct
07 May - 10 May	Air Canada
21 May - 04 Jun	jetBlue
02 May - 09 May	Lufthansa
10 May - 12 May	British Airways
05 May - 19 May	Lufthansa	direct
31 May - 01 Jun	jetBlue
10 May - 14 Jun	United	direct
25 May - 01 Jun	Discover Airlines	direct
30 May - 06 Jun	Lufthansa
31 May - 01 Jun	Lufthansa	direct

Also check the deals for one-way flights from Philadelphia to Frankfurt 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 Frankfurt in May from $787

Return flights