AirHint found the following cheapest one-way flights from Chicago (ORD) to Frankfurt (FRA) in December 2025 (see full year).
One-Way flights
| 10 Dec | Icelandair | ||
| 09 Dec | Icelandair | ||
| 06 Dec | jetBlue | ||
| 05 Dec | Frontier Airlines | ||
| 02 Dec | Spirit Airlines | ||
| 15 Dec | Arajet | ||
| 31 Dec | LOT | ||
| 24 Dec | Icelandair | ||
| 17 Dec | Frontier Airlines | ||
| 25 Dec | LOT |
Also check the deals for return flights from Chicago to Frankfurt in December.
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