AirHint found the following cheapest return flights from Zagreb (ZAG) to Vienna (VIE) in April 2026 (see full year).
Return flights
| 15 Apr - 18 Apr | Ryanair | ||
| 14 Apr - 18 Apr | Ryanair | ||
| 30 Apr - 03 May | Air Serbia | ||
| 03 Apr - 06 Apr | Air Serbia | ||
| 15 Apr - 18 Apr | Austrian Airlines | direct | |
| 30 Apr - 03 May | Austrian Airlines | direct |
Also check the deals for one-way flights from Zagreb to Vienna in April.
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