UA3856United Airlines · SAT → IAH
live · 19m ago
Route confirmed United Airlines

UA3856 San AntonioSAT HoustonIAH

UA3856 by United Airlines flies from San Antonio (SAT) to Houston (IAH).

Right nowNext departure tomorrow Operates daily
05:30

scheduled from SAT

The route today

live boards
SATSan AntonioOn-time likelySAT delay board →
IAHHoustonOn-time likelyIAH delay board →
SAT→IAHevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
30%Chance of 15+ min delay
3.0%Chance of cancellation
+6 minTypical airport delay in this weather

Driven mainly by SAT (San Antonio), currently flying IFR (instrument). 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

Forecast

San Antonio to Houston with United Airlines · Sat 31 Oct, local date

Outlook: elevated
Chance a departure leaves 60+ min late
12%1.6× usual

Forecast weather: 97% chance of rain at Houston

No cancellation outlook here: this airport's board does not publish cancellations reliably.

Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 2 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 departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Antonio to Houston flights today

same route · United Airlines
UA469departs 00:30
UA2469departs 02:35
UA410departs 02:35
UA593departs 04:35
UA753departs 04:48
UA1282departs 06:45

If UA3856 is cancelled, these are the other United Airlines nonstop flights from San Antonio to Houston on the same day, with scheduled departure times in SAT 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 UA3856 actually runs

Pro Flight Search has tracked every published board update for UA3856 across the SAT and IAH boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at SAT and IAH.

The verdict above is that record speaking, so it reflects how UA3856 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around UA3856? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA3856 San Antonio to Houston on-time performance, measured from the SAT and IAH airport boards.

Canonical URL
https://proflightsearch.com/flight/UA3856
How we measure this →