UA4020 CharlotteCLT · 17:04 HoustonIAH · 18:55
UA4020 by United Airlines flies from Charlotte (CLT) to Houston (IAH) for the Mon, Sep 7 departure.
estimated arrival at IAH · local time · ~52 min from now
board checked 25m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 18:21.
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
Early read, sample still buildingConditions at CLT 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. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
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 Charlotte to Houston flights today
same route · United AirlinesIf UA4020 is cancelled, these are the other United Airlines nonstop flights from Charlotte to Houston on the same day, with scheduled departure times in CLT local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA4020 actually runs
Pro Flight Search has tracked every published board update for UA4020 across the CLT and IAH boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left noticeably late (~21 min) but landed right on schedule. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA4020 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 CLT and IAH published them.
Planning around UA4020? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA4020 Charlotte to Houston on-time performance, measured from the CLT and IAH airport boards.
https://proflightsearch.com/flight/UA4020
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