AirHint found the following cheapest return flights from Philadelphia (PHL) to Frankfurt (FRA) in September 2026 (see full year).
Return flights
| 29 Sep - 13 Oct | Air Canada | ||
| 29 Sep - 13 Oct | Discover Airlines | direct | |
| 26 Sep - 10 Oct | Air Canada | ||
| 27 Sep - 11 Oct | Air Canada | ||
| 27 Sep - 11 Oct | Lufthansa | direct |
Also check the deals for one-way flights from Philadelphia to Frankfurt in September.
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