UA3539 WashingtonIAD · 12:43 MontréalYUL · 14:40
UA3539 by United Airlines flies from Washington (IAD) to Montréal (YUL) for the Fri, Sep 11 departure.
departs IAD · on schedule
board checked 257m ago · checking again in 45s
⚖ UA3539 typically leaves +18 and lands −24. The air wins minutes back.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 operationmedian arrival −24 min · 0 cancelled · 15 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at IAD 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 Washington to Montréal flights today
same route · United AirlinesIf UA3539 is cancelled, this is the other United Airlines nonstop flight from Washington to Montréal on the same day, with scheduled departure times in IAD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA3539 actually runs
Pro Flight Search has tracked every published board update for UA3539 across the IAD and YUL boards: schedule changes, gate pushes and actual clocks. Usually lands ~13 min early. Based on 13 confirmed landings · 11/13 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how UA3539 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: N748YX, N740YX, N751YX, N753YX.
Board clocks recorded as IAD and YUL published them.
Planning around UA3539? 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 — UA3539 Washington to Montréal on-time performance, measured from the IAD and YUL airport boards.
https://proflightsearch.com/flight/UA3539
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