Las Vegas (LAS) to San Antonio (SAT): On-Time Performance
Data through July 2026
The calendar drives reliability on LAS–SAT. January 2025 flights landed on schedule 90% of the time, but July 2026 dropped to 57% — a gap of 33 points. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 66%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 5.5
- last 12 months
- Duration
- 2h 38m
- scheduled
- Distance
- 1,069 mi
Best airline from LAS to SAT
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 82% | 13 min | 0.8% | 794 |
| Frontier Airlines | 82% | 13 min | 0.5% | 571 |
| Southwest Airlines | 75% | 15 min | 0.4% | 3,166 |
Monthly on-time trend
Best time to fly from LAS to SAT
Aim for departures around 5 a.m. (96% on-time); avoid 9 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 18 min |
| Tuesday | 83% | 12 min |
| Wednesday | 83% | 9 min |
| Thursday | 72% | 17 min |
| Friday | 71% | 20 min |
| Saturdaybest | 83% | 9 min |
| Sunday | 75% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft48%
- Airline operations37%
- National airspace system13%
- 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 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from LAS to SAT?
- Spirit Airlines has the best on-time record on this route at 82%, based on 794 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 (96% on-time), while departures around 9 p.m. have the worst (56%). 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 38m 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 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from LAS to SAT?
- July 2026 was the roughest month in this dataset, with only 57% of arrivals on time. The best was January 2025 at 90%. If your dates are flexible, that 33-point gap is worth planning around.
Explore related pages
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Related guides
Based on 4,544 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.