UA4166 ChicagoORD · 10:40 MadisonMSN
UA4166 by United Airlines flies from Chicago (ORD) to Madison (MSN) for the Tue, Aug 18 departure.
en route from ORD to MSN
board checked 13m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 10:30 · typical taxi-out at ORD ≈ 8.1 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 · 8 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 Madison flights today
same route · United AirlinesIf UA4166 is cancelled, these are the other United Airlines nonstop flights from Chicago to Madison 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 UA4166 actually runs
Pro Flight Search has tracked every published board update for UA4166 across the ORD and MSN boards: schedule changes, gate pushes and actual clocks. Usually departs ~72 min late. Based on 8 confirmed departures · 3/8 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA4166 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N536GJ, N563GJ, N511GJ, N550GJ.
Board clocks recorded as ORD and MSN published them.
Planning around UA4166? 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 — UA4166 Chicago to Madison on-time performance, measured from the ORD and MSN airport boards.
https://proflightsearch.com/flight/UA4166
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