UA4579 St LouisSTL · 08:35 HoustonIAH · 10:50
UA4579 by United Airlines flies from St Louis (STL) to Houston (IAH).
scheduled from STL
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at STL and IAH 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 St Louis to Houston flights today
same route · United AirlinesIf UA4579 is cancelled, these are the other United Airlines nonstop flights from St Louis to Houston on the same day, with scheduled departure times in STL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA4579 actually runs
Pro Flight Search has tracked every published board update for UA4579 across the STL and IAH boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: left noticeably late (~22 min) but landed about 6 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA4579 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: N513GJ, N509GJ.
Board clocks recorded as STL and IAH published them.
Planning around UA4579? 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 — UA4579 St Louis to Houston on-time performance, measured from the STL and IAH airport boards.
https://proflightsearch.com/flight/UA4579
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