UA1791 San FranciscoSFO · 14:00 WashingtonIAD · 22:19
UA1791 by United Airlines flies from San Francisco (SFO) to Washington (IAD) for the Mon, Sep 7 departure.
departs SFO · on schedule
board checked 12m 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
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SFO and IAD 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 Washington flights today
same route · United AirlinesIf UA1791 is cancelled, these are the other United Airlines nonstop flights from San Francisco to Washington 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 UA1791 actually runs
Pro Flight Search has tracked every published board update for UA1791 across the SFO and IAD boards: schedule changes, gate pushes and actual clocks. Usually lands ~26 min early. Based on 4 confirmed landings · 4/4 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 UA1791 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: N57416, N37445, N67812.
Board clocks recorded as SFO and IAD published them.
Planning around UA1791? 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 — UA1791 San Francisco to Washington on-time performance, measured from the SFO and IAD airport boards.
https://proflightsearch.com/flight/UA1791
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