UA4566 ChicagoORD · 08:40 Sioux FallsFSD · 10:29
UA4566 by United Airlines flies from Chicago (ORD) to Sioux Falls (FSD) for the Fri, Aug 21 departure.
departs ORD · on schedule
board checked 80m ago · checking again in 45s
⚖ UA4566 typically leaves +7 and lands −6. The air wins minutes back.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 −6 min · 0 cancelled · 9 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at ORD and FSD are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Chicago to Sioux Falls flights today
same route · United AirlinesIf UA4566 is cancelled, these are the other United Airlines nonstop flights from Chicago to Sioux Falls 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 UA4566 actually runs
Pro Flight Search has tracked every published board update for UA4566 across the ORD and FSD boards: schedule changes, gate pushes and actual clocks. Usually lands ~5 min early. Based on 9 confirmed landings · 8/9 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how UA4566 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: N569GJ, N578GJ, N554GJ, N521GJ.
Board clocks recorded as ORD and FSD published them.
Planning around UA4566? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA4566 Chicago to Sioux Falls on-time performance, measured from the ORD and FSD airport boards.
https://proflightsearch.com/flight/UA4566
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