AirHint found the following cheapest return flights from Washington (IAD) to Vienna (VIE) in December 2026 (see full year).
Return flights
| 25 Dec - 31 Dec | TAP | ||
| 17 Dec - 03 Jan | Icelandair | ||
| 25 Dec - 01 Jan | Austrian Airlines | ||
| 25 Dec - 01 Jan | Austrian Airlines | direct | |
| 25 Dec - 31 Dec | Austrian Airlines | direct |
Also check the deals for one-way flights from Washington to Vienna in December.
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