UA659 BostonBOS · 11:54 San FranciscoSFO · 15:03
UA659 by United Airlines flies from Boston (BOS) to San Francisco (SFO).
Same number through BOS → LAX → RNO → SFO
scheduled from BOS
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
Measured, 90-day sampleConditions 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.
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 UA659 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 UA659 actually runs
Pro Flight Search has tracked every published board update for UA659 across the BOS and SFO boards: schedule changes, gate pushes and actual clocks. Usually lands ~24 min early. Based on 5 confirmed landings · 5/5 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 UA659 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: N17428, N17414, N17438, N17413.
Board clocks recorded as BOS and SFO published them.
Planning around UA659? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA659 Boston to San Francisco on-time performance, measured from the BOS and SFO airport boards.
https://proflightsearch.com/flight/UA659
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