UA1074 BostonBOS · 11:34 San FranciscoSFO · 14:57
UA1074 by United Airlines flies from Boston (BOS) to San Francisco (SFO) for the Tue, Sep 8 departure.
estimated arrival at SFO · local time · past this estimate · waiting on the board
board checked 33m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 11:34 · typical taxi-out at BOS ≈ 9.5 min. No receiver coverage over open ocean.
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
Early read, sample still buildingConditions at BOS and SFO 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. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
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 Boston to San Francisco flights today
same route · United AirlinesIf UA1074 is cancelled, these are the other United Airlines nonstop flights from Boston to San Francisco on the same day, with scheduled departure times in BOS local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA1074 actually runs
Pro Flight Search has tracked every published board update for UA1074 across the BOS and SFO boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed -4 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA1074 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 BOS and SFO published them.
Planning around UA1074? 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 — UA1074 Boston to San Francisco on-time performance, measured from the BOS and SFO airport boards.
https://proflightsearch.com/flight/UA1074
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