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

Return flights

13 Dec - 29 Jan	British Airways
02 Dec - 09 Dec	Lufthansa	direct
04 Dec - 09 Dec	British Airways
11 Dec - 18 Dec	Lufthansa	direct
13 Dec - 29 Jan	Lufthansa	direct
23 Dec - 17 Jan	Air Canada
14 Dec - 28 Dec	Iberia
25 Dec - 08 Jan	Discover Airlines	direct
04 Dec - 09 Dec	Lufthansa	direct
21 Dec - 10 Jan	British Airways
24 Dec - 02 Jan	Air Canada
17 Dec - 31 Dec	Iberia
20 Dec - 10 Jan	Air Canada
27 Dec - 01 Jan	Frontier Airlines
24 Dec - 04 Jan	Air Canada
27 Dec - 02 Jan	Iberia

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 679€

Return flights