Best Time to Fly HOU to LAS: On-Time Stats by Hour & Airline
William P Hobby → Harry Reid International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.5% of Houston (HOU) to Las Vegas (LAS) flights arrived on time (2,021 scheduled flights). That is 2.9 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (86% on time) and May the worst month (72%).
The cancellation rate was 0.3% (US average 1.8%).
HOU to LAS on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 80.5% | 49 min | 0.3% | 2,021 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly HOU to LAS
On-time arrival % by scheduled departure hour (local time), 4,106 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 98.9% | 0.0% | 363 |
| 6am–7am | 97.1% | 0.4% | 276 |
| 7am–8am | 93.0% | 0.9% | 230 |
| 8am–9am | 90.5% | 0.5% | 381 |
| 9am–10am | 90.3% | 1.0% | 198 |
| 10am–11am | 89.8% | 0.0% | 49 |
| 11am–12pm | 78.2% | 0.0% | 229 |
| 12pm–1pm | 77.9% | 0.8% | 132 |
| 1pm–2pm | 76.4% | 0.7% | 282 |
| 2pm–3pm | 77.8% | 0.0% | 185 |
| 3pm–4pm | 76.2% | 0.0% | 147 |
| 4pm–5pm | 75.7% | 0.4% | 244 |
| 5pm–6pm | 78.7% | 0.0% | 178 |
| 6pm–7pm | 66.1% | 0.4% | 231 |
| 7pm–8pm | 71.9% | 1.8% | 221 |
| 8pm–9pm | 78.5% | 0.9% | 349 |
| 9pm–10pm | 65.5% | 0.0% | 139 |
| 10pm–11pm | 70.8% | 0.4% | 272 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on HOU to LAS
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 91.1% | +9.4 pts | 0.0% | 79 |
| Christmas & New Year (Dec 20 - Jan 3) | 81.1% | -0.7 pts | 0.0% | 170 |
| Summer peak (Jun 15 - Aug 15) | 80.9% | -0.8 pts | 0.1% | 703 |
| All other days | 81.7% | — | 0.6% | 3,154 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).