UA4523 ChicagoORD · 21:20 ChattanoogaCHA
UA4523 by United Airlines flies from Chicago (ORD) to Chattanooga (CHA).
scheduled from ORD
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operation0 cancelled · 5 operations tracked
The route today
live boardsTomorrow on this route
ForecastChicago to Chattanooga with United Airlines · Sat 31 Oct, local date
- Chance a departure is cancelled
- 0.8%1.5× usual
- Chance a departure leaves 60+ min late
- 9.6%0.8× usual
Forecast weather: 92% chance of rain at Chicago
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 4 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Chicago to Chattanooga flights today
same route · United AirlinesIf UA4523 is cancelled, these are the other United Airlines nonstop flights from Chicago to Chattanooga on the same day, with scheduled departure times in ORD local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How UA4523 actually runs
Pro Flight Search has tracked every published board update for UA4523 across the ORD and CHA boards: schedule changes, gate pushes and actual clocks. Usually departs on time. Based on 5 confirmed departures · 5/5 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA4523 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 CHA published them.
Planning around UA4523? 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: UA4523 Chicago to Chattanooga on-time performance, measured from the ORD and CHA airport boards.
https://proflightsearch.com/flight/UA4523
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