Las Vegas (LAS) to San Antonio (SAT): On-Time Performance
Data through May 2026
The calendar drives reliability on LAS–SAT. January 2025 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 78% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 67%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 5.7
- last 12 months
- Duration
- 2h 37m
- scheduled
- Distance
- 1,069 mi
Best airline from LAS to SAT
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 82% | 12 min | 0.6% | 531 |
| Spirit Airlines | 81% | 14 min | 0.7% | 854 |
| Southwest Airlines | 76% | 14 min | 0.4% | 3,035 |
Monthly on-time trend
Best time to fly from LAS to SAT
Aim for departures around 5 a.m. (97% on-time); avoid 4 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 18 min |
| Tuesday | 83% | 13 min |
| Wednesdaybest | 84% | 9 min |
| Thursday | 73% | 17 min |
| Friday | 73% | 18 min |
| Saturdaybest | 84% | 9 min |
| Sunday | 76% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations36%
- National airspace system15%
- Weather2%
Frequently asked questions
- How often are flights from LAS to SAT delayed?
- 23% of LAS–SAT 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 14 minutes.
- Which airline is most reliable from LAS to SAT?
- Frontier Airlines has the best on-time record on this route at 82%, based on 531 flights. 3 airlines flew LAS–SAT frequently enough to compare in this period.
- What is the best time of day to fly from LAS to SAT?
- Departures around 5 a.m. have the best record (97% on-time), while departures around 4 p.m. have the worst (59%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to SAT?
- The scheduled LAS–SAT flight time averages 2h 37m over 1,069 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are LAS to SAT flights cancelled?
- 0.5% 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 LAS to SAT?
- July 2024 was the roughest month in this dataset, with only 61% of arrivals on time. The best was January 2025 at 90%. If your dates are flexible, that 29-point gap is worth planning around.
Explore related pages
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Based on 4,441 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.