San Antonio (SAT) to Las Vegas (LAS): On-Time Performance
Data through July 2026
The calendar drives reliability on SAT–LAS. October 2024 flights landed on schedule 90% of the time, but July 2024 dropped to 61% — a gap of 29 points. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (92% vs 71%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 5.6
- last 12 months
- Duration
- 2h 54m
- scheduled
- Distance
- 1,069 mi
Best airline from SAT to LAS
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 82% | 10 min | 0.3% | 3,214 |
| Spirit Airlines | 82% | 16 min | 1.5% | 793 |
| Frontier Airlines | 79% | 18 min | 0.9% | 572 |
Monthly on-time trend
Best time to fly from SAT to LAS
Aim for departures around 6 a.m. (96% on-time); avoid 8 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 17 min |
| Tuesday | 89% | 7 min |
| Wednesdaybest | 90% | 8 min |
| Thursday | 76% | 15 min |
| Friday | 73% | 18 min |
| Saturday | 88% | 7 min |
| Sunday | 82% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft55%
- Airline operations19%
- National airspace system24%
- Weather2%
Frequently asked questions
- How often are flights from SAT to LAS delayed?
- 18% of SAT–LAS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from SAT to LAS?
- Southwest Airlines has the best on-time record on this route at 82%, based on 3,214 flights. 3 airlines flew SAT–LAS frequently enough to compare in this period.
- What is the best time of day to fly from SAT to LAS?
- Departures around 6 a.m. have the best record (96% on-time), while departures around 8 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SAT to LAS?
- The scheduled SAT–LAS flight time averages 2h 54m over 1,069 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are SAT to LAS flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SAT to LAS?
- July 2024 was the roughest month in this dataset, with only 61% of arrivals on time. The best was October 2024 at 90%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 4,592 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.