United Airlines
UA643 Flight Status
According to Trip.com real-time data, the UA643 flight operated by United Airlines on Aug 19, 2026 is scheduled to fly from Las Vegas (LAS) to Houston (IAH). The flight is expected to depart at 6:00 AM (local time in Las Vegas, UTC-7) and land at 8:29 PM (local time in Houston, UTC-5) .
Tue, Aug 18
Wed, Aug 19
Thu, Aug 20
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Arrived
The flight has arrived 30m early
12h 29m
SFO
3h 8m
SNA
3h 32m
Check-in Counter
--
Boarding Gate
D58
Arrival Gate
C44
Baggage
C6
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Scheduled
Your flight will depart on time.
12h 29m
SFO
3h 14m
SNA
3h 43m
Check-in Counter
--
Boarding Gate
D54
Arrival Gate
C43
Baggage
C6
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Scheduled
Your flight will depart on time.
12h 29m
SFO
2h 40m
SNA
3h 4m
Check-in Counter
--
Boarding Gate
D52
Arrival Gate
--
Baggage
--
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Information provided by VariFlightVariFlight.
For real-time updates, please check airport displays or contact your airline.
You can also explore more flights from Las Vegas to Houston or track other flights with our flight status tracker.
UA643 Aircraft Details
According to Trip.com real-time data, the UA643 flight flying from Las Vegas to Houston on 8/19/2026 is operated by the aircraft model Boeing 737-800. This aircraft has been in service for 2y, 8m. The aircraft is equipped with 166 seats.
Boeing 737-800
Punctuality (Departure)
97
%
Punctuality (Arrival)
93
%
Early on average
9 minutes
Age
2y, 8m
Seats
166
Flight Distance
--
Economy
First
Premium Economy
In-Flight Services
None
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seat Information
76 cm
More legroom than on 15% of flights
43 cm
Seat width better than on 63% of flights
100°
Reclining Angle
--
Seat layout example
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seat Information
94 cm
Legroom
53 cm
Seat width better than on 97% of flights
120°
Reclining Angle
--
Seat layout example
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seat Information
86 cm
Legroom
43 cm
Seat width better than on 5% of flights
100°
Reclining Angle
--
Seat layout example
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Flight History for UA643
Trip.com historical records show that the last UA643 flight departed on Tue, Aug 18 from LAS at approximately 6:06 AM. This flight is expected to arrrive in IAH at 7:59 PM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Fri, Aug 14 | Las Vegas (LAS) | Houston (IAH) | B38M | 6:09 AM | 8:09 PM | Arrived |
| Sat, Aug 15 | Las Vegas (LAS) | Houston (IAH) | 737 | 6:07 AM | 8:15 PM | Arrived |
| Sun, Aug 16 | Las Vegas (LAS) | Houston (IAH) | B38M | 6:03 AM | 8:17 PM | Arrived |
| Mon, Aug 17 | Las Vegas (LAS) | Houston (IAH) | B38M | 6:04 AM | 8:24 PM | Arrived |
| Tue, Aug 18 | Las Vegas (LAS) | Houston (IAH) | B38M | 6:06 AM | 7:59 PM | Arrived |
| Wed, Aug 19 | Las Vegas (LAS) | Houston (IAH) | B38M | 6:00 AM | 8:29 PM | Scheduled |
| Thu, Aug 20 | Las Vegas (LAS) | Houston (IAH) | B38M | 6:00 AM | 8:29 PM | Scheduled |
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UA643 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA643 is 97% (Late on average 12 minutes), and the on-time arrival rate is 93% (Early on average 9 minutes).
On-Time Departures
Punctuality
97
%
Late on average
12 minutes
Early
0
%
On time
97
%
30 mins late
3
%
60 mins late
0
%
90 mins late
0
%
Canceled
0
%
On-Time Arrivals
Punctuality
93
%
Early on average
9 minutes
Early
90
%
On time
3
%
30 mins late
3
%
60 mins late
0
%
90 mins late
3
%
Canceled
0
%
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