UA4661 BoiseBOI · 14:51 San FranciscoSFO · 15:51
UA4661 by United Airlines flies from Boise (BOI) to San Francisco (SFO) for the Thu, Oct 29 departure.
en route from BOI to SFO
board checked 37m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 21:38.
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 BOI and SFO are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →
Tomorrow on this route
ForecastBoise to San Francisco with United Airlines · Fri 30 Oct, local date
- Chance a departure leaves 60+ min late
- 20%0.8× usual
No cancellation outlook here: this airport's board does not publish cancellations reliably.
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 1 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Boise to San Francisco flights today
same route · United AirlinesIf UA4661 is cancelled, these are the other United Airlines nonstop flights from Boise to San Francisco on the same day, with scheduled departure times in BOI local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How UA4661 actually runs
Pro Flight Search has tracked every published board update for UA4661 across the BOI and SFO boards: schedule changes, gate pushes and actual clocks. Usually lands ~90 min late. Based on 4 confirmed landings · 1/4 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 UA4661 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: N78002, N811UA.
Board clocks recorded as BOI and SFO published them.
Planning around UA4661? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search: UA4661 Boise to San Francisco on-time performance, measured from the BOI and SFO airport boards.
https://proflightsearch.com/flight/UA4661
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