Best Time to Fly PIT to LAS: On-Time Stats by Hour & Airline
Pittsburgh International → Harry Reid International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.3% of Pittsburgh (PIT) to Las Vegas (LAS) flights arrived on time (719 scheduled flights). That is 5.6 points above the national average of 77.6%.
Southwest Airlines was the most punctual of the 2 airlines on the route at 83.5%, while Spirit Airlines trailed at 81.4%.
May has been the best month (87% on time) and Thursday the weakest day of the week (76%).
0.1% of flights were cancelled, versus 1.8% nationally.
PIT 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 | 83.5% | 52 min | 0.2% | 632 |
| Spirit Airlines | 81.4% | 55 min | 0.0% | 87 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PIT to LAS
On-time arrival % by scheduled departure hour (local time), 1,626 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.6% | 0.0% | 110 |
| 6am–7am | 93.6% | 0.4% | 266 |
| 7am–8am | 91.1% | 0.0% | 258 |
| 8am–9am | 91.2% | 0.0% | 35 |
| 9am–10am | 88.6% | 0.0% | 44 |
| 10am–11am | Limited data | 1 | |
| 11am–12pm | Limited data | 1 | |
| 12pm–1pm | 85.7% | 0.0% | 42 |
| 1pm–2pm | 71.4% | 0.0% | 43 |
| 2pm–3pm | Limited data | 24 | |
| 3pm–4pm | 85.5% | 1.6% | 63 |
| 4pm–5pm | 77.3% | 0.0% | 110 |
| 5pm–6pm | 69.7% | 0.7% | 292 |
| 6pm–7pm | 70.9% | 0.0% | 79 |
| 7pm–8pm | 76.9% | 0.9% | 228 |
| 8pm–9pm | Limited data | 24 | |
| 9pm–10pm | Limited data | 4 | |
| 10pm–11pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PIT 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 | 27 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 78.4% | -4.8 pts | 0.0% | 51 |
| Summer peak (Jun 15 - Aug 15) | 78.7% | -4.6 pts | 0.8% | 260 |
| All other days | 83.3% | — | 0.3% | 1,288 |
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).