UA1 San FranciscoSFO · 22:40 SingaporeSIN · 07:00
UA1 by United Airlines flies from San Francisco (SFO) to Singapore (SIN) for the Wed, Oct 28 departure.
estimated arrival at SIN · local time · ~8h 29m from now
board checked 52m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 22:54 · typical taxi-out at SFO ≈ 12.7 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
Measured, 90-day sampleConditions at SFO and SIN 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 Singapore with United Airlines · Fri 30 Oct, local date
- Chance a departure is cancelled
- 0.6%1.2× usual
- Chance a departure leaves 60+ min late
- 4.5%1.4× usual
Forecast weather: 60% chance of thunder and 87% chance of rain at Singapore
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 2 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 Singapore flights today
same route · United AirlinesIf UA1 is cancelled, these are the other United Airlines nonstop flights from San Francisco to Singapore 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 UA1 actually runs
Pro Flight Search has tracked every published board update for UA1 across the SFO and SIN boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: left a little late (~14 min) but landed about 24 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA1 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 SIN published them.
Planning around UA1? 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: UA1 San Francisco to Singapore on-time performance, measured from the SFO and SIN airport boards.
https://proflightsearch.com/flight/UA1
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