UA871 San FranciscoSFO · 14:25 TaipeiTPE · 18:45
UA871 by United Airlines flies from San Francisco (SFO) to Taipei (TPE) for the Sat, Sep 12 departure.
en route from SFO to TPE
board checked 15m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 14:36 · typical taxi-out at SFO ≈ 13.2 min. No receiver coverage over open ocean.
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 +10 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 TPE 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 San Francisco to Taipei flights today
same route · United AirlinesIf UA871 is cancelled, this is the other United Airlines nonstop flight from San Francisco to Taipei on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA871 actually runs
Pro Flight Search has tracked every published board update for UA871 across the SFO and TPE boards: schedule changes, gate pushes and actual clocks. Usually lands ~10 min late. Based on 4 confirmed landings · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA871 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: N2142U, N2846U, N2251U.
Board clocks recorded as SFO and TPE published them.
Planning around UA871? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA871 San Francisco to Taipei on-time performance, measured from the SFO and TPE airport boards.
https://proflightsearch.com/flight/UA871
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