UA4043 HoustonIAH · 16:30 San AntonioSAT · 12:40
UA4043 by United Airlines flies from Houston (IAH) to San Antonio (SAT).
scheduled from IAH
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at IAH and SAT are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →
Tomorrow on this route
ForecastHouston to San Antonio with United Airlines · Fri 30 Oct, local date
- Chance a departure is cancelled
- 0.3%1.2× usual
- Chance a departure leaves 60+ min late
- 7.4%1.3× usual
Forecast weather: 97% chance of rain at San Antonio
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 8 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Houston to San Antonio flights today
same route · United AirlinesIf UA4043 is cancelled, these are the other United Airlines nonstop flights from Houston to San Antonio on the same day, with scheduled departure times in IAH local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How UA4043 actually runs
Pro Flight Search has tracked every published board update for UA4043 across the IAH and SAT boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: departed +10 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA4043 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 IAH and SAT published them.
Planning around UA4043? 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: UA4043 Houston to San Antonio on-time performance, measured from the IAH and SAT airport boards.
https://proflightsearch.com/flight/UA4043
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