UA948 San FranciscoSFO · 16:45 LondonLHR · 11:10
UA948 by United Airlines flies from San Francisco (SFO) to London (LHR).
scheduled from SFO
Where the minutes go
last 5 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 operationmedian arrival −23 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SFO and LHR 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
ForecastSan Francisco to London with United Airlines · Fri 30 Oct, local date
- Chance a departure is cancelled
- 0.3%0.9× usual
- Chance a departure leaves 60+ min late
- 5.9%1.0× usual
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 3 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 San Francisco to London flights today
same route · United AirlinesIf UA948 is cancelled, these are the other United Airlines nonstop flights from San Francisco to London on the same day, with scheduled departure times in SFO 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 UA948 actually runs
Pro Flight Search has tracked every published board update for UA948 across the SFO and LHR boards: schedule changes, gate pushes and actual clocks. Usually lands ~23 min early. Based on 5 confirmed landings · 4/5 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 UA948 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 LHR published them.
Planning around UA948? 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: UA948 San Francisco to London on-time performance, measured from the SFO and LHR airport boards.
https://proflightsearch.com/flight/UA948
.