Best Time to Fly LAS to BUF: On-Time Stats by Hour & Airline
Harry Reid International → Buffalo Niagara International
Data through July 2026 · Last updated October 18, 2026
302 flights were scheduled from Las Vegas (LAS) to Buffalo (BUF) in the last 12 months, and 71.6% of those that flew arrived on time, 6.1 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
January has been the best month (86% on time) and Sunday the weakest day of the week (58%).
0.7% of flights were cancelled, versus 1.8% nationally.
LAS to BUF 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 | 71.6% | 46 min | 0.7% | 302 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAS to BUF
On-time arrival % by scheduled departure hour (local time), 687 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 17 | |
| 8am–9am | 81.1% | 1.9% | 108 |
| 9am–10am | 91.9% | 0.0% | 74 |
| 10am–11am | 78.2% | 0.0% | 110 |
| 11am–12pm | 84.6% | 0.0% | 91 |
| 12pm–1pm | 61.0% | 0.0% | 41 |
| 1pm–2pm | Limited data | 18 | |
| 2pm–3pm | 62.5% | 0.0% | 41 |
| 3pm–4pm | 72.3% | 0.0% | 65 |
| 4pm–5pm | 58.3% | 1.6% | 61 |
| 5pm–6pm | Limited data | 19 | |
| 6pm–7pm | 50.0% | 0.0% | 42 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAS to BUF
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) | 70.0% | -6.9 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 64.4% | -12.5 pts | 0.0% | 90 |
| All other days | 76.9% | — | 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).