UA871United Airlines · SFO → TPE
live · 14m ago
Route confirmed United Airlines

UA871 San FranciscoSFO · 13:45 TaipeiTPE · 19:00

UA871 by United Airlines flies from San Francisco (SFO) to Taipei (TPE) for the Fri, Oct 30 departure.

Right nowOn Time · today
13:45

departs SFO · on schedule

Typical gate push−5 minmedian posted departure
Typical arrival−42 minmedian over 5 operations
Wins back in air~37 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 5 operations · gate push → arrival
0+30+60+90 min
10-30
−42 arrival
10-29
−3 gate · −42 arrival
10-28
−10 gate · −59 arrival
10-27
−6 gate · −36 arrival
10-26
−5 gate · −16 arrival

The 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 operation

median arrival −42 min · 0 cancelled · 5 operations tracked

The route today

live boards
SFOSan FranciscoOn-time likelySFO delay board →
TPETaipeiOn-time likelyTPE delay board →
SFO→TPEevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
48%Chance of 15+ min delay
2.0%Chance of cancellation
+12 minTypical airport delay in this weather

Conditions 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. 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

Forecast

San Francisco to Taipei with United Airlines · Sat 31 Oct, local date

Outlook: about usual
Chance a departure is cancelled
0.4%0.7× usual
Chance a departure leaves 60+ min late
2.8%1.5× usual

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 departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Francisco to Taipei flights today

same route · United Airlines
UA853departs 23:10

If 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 that show a delay still operate. Rebooking usually helps only when that delay is very large. 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 ~42 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 UA871 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
10-30SFO 13:45TPE 19:00 18:18 (−42)
10-29SFO 13:45 13:42 (−3)TPE 19:00 18:18 (−42)
10-28SFO 13:45 13:35 (−10)TPE 19:00 18:01 (−59)
10-27SFO 13:45 13:39 (−6)TPE 19:00 18:24 (−36)
10-26SFO 13:45 13:40 (−5)TPE 19:00 18:44 (−16)

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

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA871 San Francisco to Taipei on-time performance, measured from the SFO and TPE airport boards.

Canonical URL
https://proflightsearch.com/flight/UA871
How we measure this →