UA643United Airlines · SNA → IAH
live · 42m ago
Route confirmed United Airlines

UA643 Santa AnaSNA · 14:59 HoustonIAH · 20:15

UA643 by United Airlines flies from Santa Ana (SNA) to Houston (IAH) for the Wed, Oct 28 departure.

Right nowExpected in Houston · today
20:15

arrival expected at IAH · on schedule

Typical gate push+9 minmedian posted departure
Typical arrival+2 minmedian over 2 operations
Wins back in air~7 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 3 operations · gate push → arrival
0+30+60+90 min
10-28
+9 gate
10-27
+9 gate · +2 arrival
10-26
−28 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The route today

live boards
SNASanta AnaOn-time likelySNA delay board →
IAHHoustonOn-time likelyIAH delay board →
SNA→IAHevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
31%Chance of 15+ min delay
1.0%Chance of cancellation
+2 minAvg hub delay right now

Conditions at SNA 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 →

Tomorrow on this route

Forecast

Santa Ana to Houston with United Airlines · Thu 29 Oct, local date

Outlook: about usual
Chance a departure leaves 60+ min late
4.9%1.4× usual

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 3 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 Santa Ana to Houston flights today

same route · United Airlines
UA273departs 08:05
UA700departs 08:10
UA2044departs 12:06

If UA643 is cancelled, these are the other United Airlines nonstop flights from Santa Ana to Houston on the same day, with scheduled departure times in SNA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA643 actually runs

Pro Flight Search has tracked every published board update for UA643 across the SNA and IAH boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +2 min. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA643 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
10-28SNA 14:59 15:08 (+9)IAH 20:15
10-27SNA 14:59 15:08 (+9)IAH 20:15 20:17 (+2)
10-26SNA IAH 20:15 19:47 (−28)

Aircraft

Recent tails: N47340.

Board clocks recorded as SNA and IAH published them.

Planning around UA643? 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 — UA643 Santa Ana to Houston on-time performance, measured from the SNA and IAH airport boards.

Canonical URL
https://proflightsearch.com/flight/UA643
How we measure this →