AirHint found the following cheapest one-way flights from Chicago (ORD) to Vienna (VIE) in May 2026 (see full year).
One-Way flights
| 28 May | Alaska Airlines | ||
| 21 May | Sun Country Airlines | ||
| 19 May | SWISS | ||
| 15 May | Lufthansa | ||
| 21 May | Austrian Airlines | direct | |
| 28 May | Austrian Airlines | direct | |
| 15 May | Austrian Airlines | direct |
Also check the deals for return flights from Chicago to Vienna in May.
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