AirHint found the following cheapest return flights from Philadelphia (PHL) to Frankfurt (FRA) in December 2025 (see full year).

Return flights

03 Dec - 10 Dec	United
23 Dec - 30 Dec	United	direct
08 Dec - 15 Dec	United
25 Dec - 08 Jan	British Airways
13 Dec - 20 Dec	United	direct
25 Dec - 08 Jan	Discover Airlines	direct
16 Dec - 27 Dec	United	direct
22 Dec - 05 Jan	British Airways
20 Dec - 30 Dec	Air Canada
23 Dec - 03 Jan	United
18 Dec - 25 Dec	Discover Airlines	direct
20 Dec - 30 Dec	Lufthansa	direct
20 Dec - 29 Dec	Air Canada
19 Dec - 23 Dec	United
19 Dec - 01 Jan	United

Also check the deals for one-way flights from Philadelphia to Frankfurt in December.

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 December from 591€

Return flights