Best Time to Fly SAT to LAS: On-Time Stats by Hour & Airline
San Antonio International → Harry Reid International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.8% of San Antonio (SAT) to Las Vegas (LAS) flights arrived on time (2,040 scheduled flights). That is 2.2 points above the national average of 77.6%.
Spirit Airlines was the most punctual of the 3 airlines on the route at 81.0%, while Frontier Airlines trailed at 76.7%.
November has been the best month (90% on time) and Friday the weakest day of the week (74%).
0.5% of flights were cancelled, versus 1.8% nationally.
SAT 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 |
|---|---|---|---|---|
| Spirit Airlines | 81.0% | 103 min | 0.6% | 180 |
| Southwest Airlines | 80.3% | 52 min | 0.4% | 1,569 |
| Frontier Airlines | 76.7% | 72 min | 1.0% | 291 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAT to LAS
On-time arrival % by scheduled departure hour (local time), 4,392 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 90.0% | 1.6% | 253 |
| 6am–7am | 95.6% | 0.0% | 430 |
| 7am–8am | 93.4% | 0.0% | 166 |
| 8am–9am | 95.5% | 1.5% | 136 |
| 9am–10am | 88.0% | 0.0% | 108 |
| 10am–11am | 90.1% | 0.0% | 273 |
| 11am–12pm | 90.1% | 0.3% | 285 |
| 12pm–1pm | 84.6% | 0.0% | 222 |
| 1pm–2pm | 85.8% | 0.7% | 403 |
| 2pm–3pm | 76.2% | 0.6% | 332 |
| 3pm–4pm | 82.1% | 2.0% | 148 |
| 4pm–5pm | 78.1% | 0.0% | 283 |
| 5pm–6pm | 70.8% | 0.0% | 241 |
| 6pm–7pm | 80.8% | 0.0% | 239 |
| 7pm–8pm | 77.5% | 0.0% | 237 |
| 8pm–9pm | 64.9% | 1.3% | 303 |
| 9pm–10pm | 68.7% | 0.4% | 234 |
| 10pm–11pm | 79.6% | 1.0% | 99 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAT 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) | 90.2% | +7.1 pts | 0.0% | 92 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.3% | -2.8 pts | 0.5% | 189 |
| Summer peak (Jun 15 - Aug 15) | 80.4% | -2.8 pts | 0.7% | 703 |
| All other days | 83.2% | — | 0.4% | 3,408 |
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).