UA1271 San FranciscoSFO · 10:50 Mexico CityMEX · 16:15
UA1271 by United Airlines flies from San Francisco (SFO) to Mexico City (MEX) for the Mon, Sep 7 departure.
departs SFO · on schedule
board checked 7m ago · checking again in 45s
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
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by SFO (San Francisco), currently flying VFR (visual). 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 Mexico City flights today
same route · United AirlinesIf UA1271 is cancelled, these are the other United Airlines nonstop flights from San Francisco to Mexico City 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 UA1271 actually runs
Pro Flight Search has tracked every published board update for UA1271 across the SFO and MEX boards: schedule changes, gate pushes and actual clocks. Usually departs ~9 min late. Based on 4 confirmed departures · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA1271 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: N37342, N27253, N17328, N17314.
Board clocks recorded as SFO and MEX published them.
Planning around UA1271? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA1271 San Francisco to Mexico City on-time performance, measured from the SFO and MEX airport boards.
https://proflightsearch.com/flight/UA1271
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