UA4428 Sioux FallsFSD · 15:06 ChicagoORD · 17:05
UA4428 by United Airlines flies from Sioux Falls (FSD) to Chicago (ORD) for the Mon, Sep 7 departure.
arrived at ORD · 20 min early
Where the minutes go
last 5 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 +117 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at FSD and ORD 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 Sioux Falls to Chicago flights today
same route · United AirlinesIf UA4428 is cancelled, these are the other United Airlines nonstop flights from Sioux Falls to Chicago on the same day, with scheduled departure times in FSD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA4428 actually runs
Pro Flight Search has tracked every published board update for UA4428 across the FSD and ORD boards: schedule changes, gate pushes and actual clocks. Usually lands ~117 min late. Based on 4 confirmed landings · 2/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA4428 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: N566GJ, N521GJ, N523GJ, N508GJ.
Board clocks recorded as FSD and ORD published them.
Planning around UA4428? 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 — UA4428 Sioux Falls to Chicago on-time performance, measured from the FSD and ORD airport boards.
https://proflightsearch.com/flight/UA4428
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