AC521 MontréalYUL · 08:40 ChicagoORD · 10:15
AC521 by Air Canada Jetz flies from Montréal (YUL) to Chicago (ORD) for the Thu, Sep 10 departure.
departs YUL · on schedule
board checked 22m 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 YUL and ORD 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 Montréal to Chicago flights today
same route · Air Canada JetzIf AC521 is cancelled, these are the other Air Canada Jetz nonstop flights from Montréal to Chicago on the same day, with scheduled departure times in YUL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AC521 actually runs
Pro Flight Search has tracked every published board update for AC521 across the YUL and ORD boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed +6 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how AC521 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: C-FHYY, C-FCQD, C-GWUT.
Board clocks recorded as YUL and ORD published them.
Planning around AC521? 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 — AC521 Montréal to Chicago on-time performance, measured from the YUL and ORD airport boards.
https://proflightsearch.com/flight/AC521
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