UA4540United Airlines · CHA → ORD
live · 21m ago
Route confirmed United Airlines

UA4540 ChattanoogaCHA ChicagoORD

UA4540 by United Airlines flies from Chattanooga (CHA) to Chicago (ORD).

Right nowNext departure today Operates daily
17:17

scheduled from CHA

The route today

live boards
CHAChattanoogaOn-time likelyCHA delay board →
ORDChicagoOn-time likelyORD delay board →
CHA→ORDevery carrier, schedules and on-time historyRoute intelligence →

Tomorrow at ORD

Forecast

Fri 13 Nov, local date

High6°Clikely 4°C to 7°C
Low2°Clikely 0°C to 4°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

How UA4540 actually runs

Pro Flight Search has tracked every published board update for UA4540 across the CHA and ORD boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at CHA and ORD.

The verdict above is that record speaking, so it reflects how UA4540 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around UA4540? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA4540 Chattanooga to Chicago on-time performance, measured from the CHA and ORD airport boards.

Canonical URL
https://proflightsearch.com/flight/UA4540
How we measure this →