UA278 TorontoYYZ · 17:15 ChicagoORD · 18:30
UA278 by United Airlines flies from Toronto (YYZ) to Chicago (ORD) for the Wed, Oct 21 departure.
arrival expected at ORD · on schedule
board checked 63m ago · checking again in 45s
Where the minutes go
last 4 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 YYZ 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 Toronto to Chicago flights today
same route · United AirlinesIf UA278 is cancelled, these are the other United Airlines nonstop flights from Toronto to Chicago on the same day, with scheduled departure times in YYZ local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA278 actually runs
Pro Flight Search has tracked every published board update for UA278 across the YYZ and ORD boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: left right on schedule but landed about 17 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA278 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: N79279, N33289.
Board clocks recorded as YYZ and ORD published them.
Planning around UA278? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA278 Toronto to Chicago on-time performance, measured from the YYZ and ORD airport boards.
https://proflightsearch.com/flight/UA278
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