Cheapest return flights from Philadelphia to Frankfurt in September from 563€

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

Return flights

04 Sep - 28 Sep Frontier Airlines
02 Sep - 30 Sep KLM
30 Sep - 14 Oct Delta
17 Sep - 23 Sep British Airways
03 Sep - 10 Sep Lufthansa direct
09 Sep - 16 Sep Discover Airlines direct
24 Sep - 01 Oct Discover Airlines direct
30 Sep - 07 Oct Discover Airlines direct
30 Sep - 14 Oct Discover Airlines direct
12 Sep - 19 Sep United direct
05 Sep - 28 Sep Condor
18 Sep - 22 Sep Condor
18 Sep - 23 Sep Condor
15 Sep - 22 Sep United
27 Sep - 04 Oct Lufthansa
23 Sep - 03 Oct United direct

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

Skyscanner

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.

Book a cheap hotel in Frankfurt

Cheap car rent in Frankfurt

Feel free to contact us with any feedback or request another flight research.