OS721 ViennaVIE · 09:20 BelgradeBEG · 10:25
OS721 by Austrian Airlines flies from Vienna (VIE) to Belgrade (BEG) for the Mon, Sep 7 departure.
departs VIE · on schedule
board checked 55m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions 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. For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
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 posting a delay still operate — rebooking usually only beats a very large posted delay. 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 — pattern not clear yet. Only 2 completed legs so far: left noticeably late (~24 min) but landed a little late (~6 min). 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 operationAircraft
Recent tails: OE-LWC.
Board 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
.