UA8543 New YorkEWR · 18:40 MontréalYUL
UA8543 by United Airlines flies from New York (EWR) to Montréal (YUL) for the Fri, Sep 18 departure.
departs EWR · on schedule
board checked 6m ago · checking again in 45s
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operation3 cancelled · 14 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at EWR 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 New York to Montréal flights today
same route · United AirlinesIf UA8543 is cancelled, these are the other United Airlines nonstop flights from New York to Montréal on the same day, with scheduled departure times in EWR local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA8543 actually runs
Pro Flight Search has tracked every published board update for UA8543 across the EWR and YUL boards: schedule changes, gate pushes and actual clocks. Usually departs on time. Based on 10 confirmed departures · 9/10 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA8543 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 EWR and YUL published them.
Planning around UA8543? 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 — UA8543 New York to Montréal on-time performance, measured from the EWR and YUL airport boards.
https://proflightsearch.com/flight/UA8543
.