OS721 ViennaVIE · 09:20 BelgradeBEG · 10:25
OS721 by Austrian Airlines flies from Vienna (VIE) to Belgrade (BEG) for the Sat, Oct 31 departure.
departs VIE · on schedule
board checked 54m ago · checking again in 45s
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at VIE and BEG are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow on this route
ForecastVienna to Belgrade with Austrian Airlines · Sat 31 Oct, local date
- Chance a departure is cancelled
- 0.6%1.6× usual
- Chance a departure leaves 60+ min late
- 2.1%0.9× usual
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 3 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Vienna to Belgrade flights today
same route · Austrian AirlinesIf OS721 is cancelled, these are the other Austrian Airlines nonstop flights from Vienna to Belgrade on the same day, with scheduled departure times in VIE local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How OS721 actually runs
Pro Flight Search has tracked every published board update for OS721 across the VIE and BEG boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: left a little late (~18 min) but landed right on schedule. Not enough to call it.
The verdict above is that record speaking, so it reflects how OS721 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as VIE and BEG published them.
Planning around OS721? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: OS721 Vienna to Belgrade on-time performance, measured from the VIE and BEG airport boards.
https://proflightsearch.com/flight/OS721
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