San Antonio (SAT) to Las Vegas (LAS): On-Time Performance
Data through May 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 83% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 72%), which matters most in the rough months.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 5.7
- last 12 months
- Duration
- 2h 54m
- scheduled
- Distance
- 1,069 mi
Best airline from SAT to LAS
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 83% | 10 min | 0.3% | 3,065 |
| Spirit Airlines | 82% | 16 min | 1.4% | 853 |
| Frontier Airlines | 80% | 16 min | 0.9% | 532 |
Monthly on-time trend
Best time to fly from SAT to LAS
Aim for departures around 8 a.m. (96% on-time); avoid 8 p.m. departures (65%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 17 min |
| Tuesday | 88% | 8 min |
| Wednesdaybest | 90% | 9 min |
| Thursday | 78% | 13 min |
| Friday | 75% | 16 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 aircraft54%
- Airline operations19%
- National airspace system24%
- Weather3%
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 2024-06 and 2026-05. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from SAT to LAS?
- Southwest Airlines has the best on-time record on this route at 83%, based on 3,065 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 8 a.m. have the best record (96% on-time), while departures around 8 p.m. have the worst (65%). 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 2024-06 and 2026-05, 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 4,471 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.