AirHint found the following cheapest return flights from Washington (IAD) to Frankfurt (FRA) in September 2026 (see full year).
Return flights
| 04 Sep - 07 Sep | Icelandair | ||
| 17 Sep - 01 Oct | Turkish Airlines | ||
| 17 Sep - 26 Sep | Turkish Airlines | ||
| 17 Sep - 01 Oct | Lufthansa | direct | |
| 17 Sep - 26 Sep | Lufthansa | direct | |
| 04 Sep - 07 Sep | Lufthansa | direct |
Also check the deals for one-way flights from Washington to Frankfurt in September.
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