UA3931 ChicagoORD San FranciscoSFO
UA3931 by United Airlines flies from Chicago (ORD) to San Francisco (SFO).
scheduled from ORD
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 Chicago to San Francisco flights today
same route · United AirlinesIf UA3931 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 UA3931 actually runs
Pro Flight Search has tracked every published board update for UA3931 across the ORD and SFO boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at ORD and SFO.
The verdict above is that record speaking, so it reflects how UA3931 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around UA3931? 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 — UA3931 Chicago to San Francisco on-time performance, measured from the ORD and SFO airport boards.
https://proflightsearch.com/flight/UA3931
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