AA1851 ChicagoORD · 11:10 San FranciscoSFO · 13:50
AA1851 by American Airlines flies from Chicago (ORD) to San Francisco (SFO) for the Tue, Aug 18 departure.
arrived at SFO · 7 min late
Where the minutes go
last 3 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 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.
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 · American AirlinesIf AA1851 is cancelled, these are the other American 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 AA1851 actually runs
Pro Flight Search has tracked every published board update for AA1851 across the ORD and SFO boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed +7 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how AA1851 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 AA1851? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AA1851 Chicago to San Francisco on-time performance, measured from the ORD and SFO airport boards.
https://proflightsearch.com/flight/AA1851
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