UA4539 ChicagoORD · 06:55 GreensboroGSO
UA4539 by United Airlines flies from Chicago (ORD) to Greensboro (GSO) for the Tue, Oct 13 departure.
en route from ORD to GSO
board checked 25m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 06:45 · typical taxi-out at ORD ≈ 7.3 min.
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 · 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.
Other Chicago to Greensboro flights today
same route · United AirlinesIf UA4539 is cancelled, these are the other United Airlines nonstop flights from Chicago to Greensboro 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 UA4539 actually runs
Pro Flight Search has tracked every published board update for UA4539 across the ORD and GSO boards: schedule changes, gate pushes and actual clocks. Usually departs ~8 min early. Based on 14 confirmed departures · 11/14 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA4539 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 GSO published them.
Planning around UA4539? 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 — UA4539 Chicago to Greensboro on-time performance, measured from the ORD and GSO airport boards.
https://proflightsearch.com/flight/UA4539
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