OS521 ViennaVIE · 08:10 MilanLIN · 09:35
OS521 by Austrian Airlines flies from Vienna (VIE) to Milan (LIN) for the Wed, Aug 19 departure.
departs VIE · on schedule
board checked 40m 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 LIN 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 Milan flights today
same route · Austrian AirlinesIf OS521 is cancelled, these are the other Austrian Airlines nonstop flights from Vienna to Milan 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 OS521 actually runs
Pro Flight Search has tracked every published board update for OS521 across the VIE and LIN boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left noticeably late (~21 min) but landed right on schedule. Not enough to call it.
The verdict above is that record speaking, so it reflects how OS521 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: OELWG, OELBS.
Board clocks recorded as VIE and LIN published them.
Planning around OS521? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — OS521 Vienna to Milan on-time performance, measured from the VIE and LIN airport boards.
https://proflightsearch.com/flight/OS521
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