UA8128 San FranciscoSFO · 13:25 TorontoYYZ
UA8128 by United Airlines flies from San Francisco (SFO) to Toronto (YYZ) for the Mon, Aug 17 departure.
departs SFO · 10 min early
board checked 54m 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 operation0 cancelled · 14 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SFO and YYZ 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 San Francisco to Toronto flights today
same route · United AirlinesIf UA8128 is cancelled, these are the other United Airlines nonstop flights from San Francisco to Toronto on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA8128 actually runs
Pro Flight Search has tracked every published board update for UA8128 across the SFO and YYZ boards: schedule changes, gate pushes and actual clocks. Usually departs ~10 min late. Based on 13 confirmed departures · 8/13 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA8128 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 SFO and YYZ published them.
Planning around UA8128? 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 — UA8128 San Francisco to Toronto on-time performance, measured from the SFO and YYZ airport boards.
https://proflightsearch.com/flight/UA8128
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