AirHint found the following cheapest one-way flights from Chicago (ORD) to Frankfurt (FRA) in September 2026 (see full year).
One-Way flights
| 27 Sep | Austrian Airlines | ||
| 12 Sep | Air Serbia | ||
| 04 Sep | LOT | ||
| 27 Sep | Lufthansa | direct | |
| 12 Sep | United | direct | |
| 04 Sep | United | direct |
Also check the deals for return flights from Chicago to Frankfurt in September.
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