Cheapest return flights from Philadelphia to Frankfurt in September from 611€

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

Return flights

21 Sep - 28 Sep Condor
30 Sep - 15 Oct Frontier Airlines
21 Sep - 06 Oct Frontier Airlines
20 Sep - 27 Sep Frontier Airlines
23 Sep - 03 Oct Frontier Airlines
30 Sep - 15 Oct Discover Airlines direct
23 Sep - 03 Oct United direct
21 Sep - 28 Sep Discover Airlines direct
19 Sep - 23 Sep Lufthansa direct
21 Sep - 06 Oct Discover Airlines 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.