UA1851 MiamiMIA · 11:30 HoustonIAH · 13:22
UA1851 by United Airlines flies from Miami (MIA) to Houston (IAH).
scheduled from MIA
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at MIA 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 Miami to Houston flights today
same route · United AirlinesIf UA1851 is cancelled, these are the other United Airlines nonstop flights from Miami to Houston on the same day, with scheduled departure times in MIA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA1851 actually runs
Pro Flight Search has tracked every published board update for UA1851 across the MIA and IAH boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +249 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA1851 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: N47414.
Board clocks recorded as MIA and IAH published them.
Planning around UA1851? 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 — UA1851 Miami to Houston on-time performance, measured from the MIA and IAH airport boards.
https://proflightsearch.com/flight/UA1851
.