UA2251 ChicagoORD · 16:00 San FranciscoSFO · 18:49
UA2251 by United Airlines flies from Chicago (ORD) to San Francisco (SFO) for the Tue, Sep 8 departure.
estimated arrival at SFO · local time · ~3h 03m from now
position updated 5m ago · checking again in 90s
Live position · flown path, last 1h 4m
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at ORD and SFO 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. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
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 Chicago to San Francisco flights today
same route · United AirlinesIf UA2251 is cancelled, these are the other United Airlines nonstop flights from Chicago to San Francisco on the same day, with scheduled departure times in ORD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA2251 actually runs
Pro Flight Search has tracked every published board update for UA2251 across the ORD and SFO boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 1 completed leg so far: left heavily delayed (~71 min) but landed heavily delayed (~48 min). Not enough to call it.
The verdict above is that record speaking, so it reflects how UA2251 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 ORD and SFO published them.
Planning around UA2251? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA2251 Chicago to San Francisco on-time performance, measured from the ORD and SFO airport boards.
https://proflightsearch.com/flight/UA2251
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