UA4540 ChattanoogaCHA ChicagoORD · 07:04
UA4540 by United Airlines flies from Chattanooga (CHA) to Chicago (ORD) for the Mon, Sep 14 departure.
arrived at ORD · on schedule
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 operationmedian arrival −13 min · 0 cancelled · 15 operations tracked
The route today
live boardsWhen it flies
scheduled departuresEach 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. Usually lands ~11 min early. Based on 14 confirmed landings · 14/14 within 15 min of schedule.
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.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as CHA and ORD published them.
Planning around UA4540? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA4540 Chattanooga to Chicago on-time performance, measured from the CHA and ORD airport boards.
https://proflightsearch.com/flight/UA4540
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