AirHint found the following cheapest one-way flights from Chicago (ORD) to Vienna (VIE) in December 2025 (see full year).
One-Way flights
| 31 Dec | Icelandair | ||
| 24 Dec | SWISS | ||
| 25 Dec | LOT | ||
| 27 Dec | LOT | ||
| 26 Dec | Frontier Airlines | ||
| 31 Dec | Austrian Airlines | direct | |
| 27 Dec | Austrian Airlines | direct |
Also check the deals for return flights from Chicago to Vienna in December.
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