UA4397 ChicagoORD · 10:30 ChattanoogaCHA
UA4397 by United Airlines flies from Chicago (ORD) to Chattanooga (CHA).
scheduled from ORD
Where the minutes go
last 7 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 · 8 operations tracked
The route today
live boardsTomorrow on this route
ForecastChicago to Chattanooga with United Airlines · Thu 29 Oct, local date
- Chance a departure is cancelled
- 0.8%1.4× usual
- Chance a departure leaves 60+ min late
- 8.7%0.7× usual
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 UA4397 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 posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA4397 actually runs
Pro Flight Search has tracked every published board update for UA4397 across the ORD and CHA boards: schedule changes, gate pushes and actual clocks. Usually departs ~5 min early. Based on 8 confirmed departures · 8/8 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA4397 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 UA4397? 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 — UA4397 Chicago to Chattanooga on-time performance, measured from the ORD and CHA airport boards.
https://proflightsearch.com/flight/UA4397
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