Flight number record
UA 1264
United Airlines · Houston to Las Vegas
- Route
- IAH → LAS
- Departs
- 07:35
- Flights
- 324
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1264, check with United Airlines.
UA 1264 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 18 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 324 flights, with a median arrival 16 minutes early.
Set against the rest of the country, UA 1264's record is 18 points better than the US average of 77.3%. That gap is worth roughly 178 fewer late arrivals for every thousand flights.
Key figures
On time
95.1%
Arrivals under 15 minutes late, of 324 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.5%
National rate is 8.3%
These figures cover 324 flights between September 2025 and August 2026. The median arrival is 16 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When UA 1264 flies
UA 1264 flies IAH to LAS without a single fixed slot. Its most common scheduled departure was 07:35, used on 106 of 324 flights, with 07:20 (82 flights) and 07:30 (70 flights) next.
- Departs 07:35106 flights32.7%
- Departs 07:2082 flights25.3%
- Departs 07:3070 flights21.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:35 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 1264 runs 6 points better at 95.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 1264 next to IAH to LAS
Every carrier on IAH to LAS combined arrived on time 82.8% of the time across 3,409 flights, so UA 1264 is 12 points ahead of it. United flew 2,598 flights on the same city pair under all its flight numbers, including this one, and those ran 85.2% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 16 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1264thin sample | 324 | 95.1% | 56 min | 0.00% | A+ |
| All United Airlines on IAH–LAS | 2,598 | 85.2% | 60 min | 0.27% | A+ |
| All carriers on IAH–LAS | 3,409 | 82.8% | 71 min | 0.85% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1264 quarter by quarter
Quarter by quarter UA 1264 held fairly steady: 93.2% in Oct–Dec 2025, 98.8% in Jan–Mar 2026, 94.5% in Apr–Jun 2026 and 94.9% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 20255 flights—
- Oct–Dec 202588 flights93.2%
- Jan–Mar 202681 flights98.8%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202659 flights94.9%
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1264 ranged from 89.8% on Saturday to 98.0% on Thursday. With about 46 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 1264 runs when it is late
UA 1264 often beats the schedule: 170 of 324 completed flights, 52%, arrived 15 minutes or more early. Most of the lateness is short. 8 of the 16 late arrivals were under half an hour behind, and 5 reached an hour or more.
- 15+ min early170 flights52.5%
- Within 15 min138 flights42.6%
- 15–29 min late8 flights2.5%
- 30–59 min late3 flights0.9%
- 1–2 hours late3 flights0.9%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 324 completed flights by arrival against schedule.
Only 18 of 324 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for UA 1264
The latest arrival of the period was on 15 May 2026, 4 hours 26 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across May, December, July and November, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 May 2026 | 4 hours 26 minutes | Carrier |
| 28 December 2025 | 2 hours 11 minutes | Late-arriving aircraft |
| 11 July 2026 | 1 hour 44 minutes | Late-arriving aircraft |
| 14 July 2026 | 1 hour 9 minutes | National Airspace System |
| 20 November 2025 | 1 hour | Carrier |
Delay causes
Why UA 1264 runs late
Late-arriving aircraft accounts for 43% of the 892 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 39%Carrier
- 14%National Airspace System
- 5%Extreme weather
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 892 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 892 delay minutes reported on UA 1264.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.5% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,222 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on seven other city pairs in the data, including DEN to JAX (24), DEN to SNA (3) and SFO to SMF (2), but none flew often enough under UA 1264 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to LAS only.
One caution: this is a thin sample. 324 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking UA 1264
For a booking, UA 1264 has one of the better records a US domestic flight can show: 95.1% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IAH to LAS, every carrier and departure
- LAS to IAH, the return direction
- United Airlines 1799 on the same route88.4%
- United Airlines 1971 on the same route85.4%
- United Airlines 1524 on the same route89.2%
- George Bush Intercontinental (IAH) delay statistics
- Harry Reid International (LAS) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.