UA3521 ChicagoORD MontréalYUL
UA3521 by United Airlines flies from Chicago (ORD) to Montréal (YUL).
scheduled from ORD
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at ORD and YUL 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.
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 Chicago to Montréal flights today
same route · United AirlinesIf UA3521 is cancelled, these are the other United Airlines nonstop flights from Chicago to Montréal on the same day, with scheduled departure times in ORD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA3521 actually runs
Pro Flight Search has tracked every published board update for UA3521 across the ORD and YUL boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at ORD and YUL.
The verdict above is that record speaking, so it reflects how UA3521 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around UA3521? 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 — UA3521 Chicago to Montréal on-time performance, measured from the ORD and YUL airport boards.
https://proflightsearch.com/flight/UA3521
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