Best Time to Fly BUF to LAS: On-Time Stats by Hour & Airline
Buffalo Niagara International → Harry Reid International
Data through July 2026 · Last updated October 18, 2026
302 flights were scheduled from Buffalo (BUF) to Las Vegas (LAS) in the last 12 months, and 81.9% of those that flew arrived on time, 4.3 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
July has been the best month (95% on time) and Saturday the weakest day of the week (81%).
0.7% of flights were cancelled, versus 1.8% nationally.
BUF 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 | 81.9% | 48 min | 0.7% | 302 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BUF to LAS
On-time arrival % by scheduled departure hour (local time), 687 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 88.4% | 0.0% | 43 |
| 6am–7am | 95.2% | 0.0% | 105 |
| 7am–8am | 91.9% | 1.6% | 64 |
| 8am–9am | 88.6% | 0.0% | 35 |
| 9am–10am | Limited data | 28 | |
| 10am–11am | Limited data | 21 | |
| 12pm–1pm | Limited data | 23 | |
| 1pm–2pm | 80.7% | 0.0% | 57 |
| 2pm–3pm | 75.9% | 0.0% | 58 |
| 3pm–4pm | 84.2% | 0.0% | 102 |
| 4pm–5pm | 81.8% | 1.8% | 56 |
| 5pm–6pm | 65.8% | 0.0% | 73 |
| 6pm–7pm | Limited data | 3 | |
| 7pm–8pm | Limited data | 19 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BUF 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) | Limited data | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 66.7% | -17.3 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 86.7% | +2.7 pts | 0.0% | 90 |
| All other days | 84.0% | — | 0.5% | 554 |
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).