San Jose (SJC) to Las Vegas (LAS): On-Time Performance
Data through July 2026
When you fly SJC to LAS matters as much as anything else about the booking: the route swung from 90% on-time in November 2024 to just 74% in July 2025. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 74%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 10
- last 12 months
- Duration
- 1h 30m
- scheduled
- Distance
- 386 mi
Best airline from SJC to LAS
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 82% | 11 min | 0.5% | 6,819 |
| Spirit Airlines | 81% | 14 min | 1.0% | 1,301 |
| SkyWest Airlines | 79% | 17 min | 0.0% | 257 |
| Frontier Airlines | 74% | 20 min | 1.1% | 459 |
Monthly on-time trend
Best time to fly from SJC to LAS
Aim for departures around 7 a.m. (96% on-time); avoid 3 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 12 min |
| Tuesday | 88% | 9 min |
| Wednesday | 88% | 7 min |
| Thursday | 72% | 18 min |
| Friday | 75% | 17 min |
| Saturdaybest | 89% | 7 min |
| Sunday | 82% | 11 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 operations20%
- National airspace system31%
- Weather2%
Frequently asked questions
- How often are flights from SJC to LAS delayed?
- 19% of SJC–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 12 minutes.
- Which airline is most reliable from SJC to LAS?
- Southwest Airlines has the best on-time record on this route at 82%, based on 6,819 flights. 4 airlines flew SJC–LAS frequently enough to compare in this period.
- What is the best time of day to fly from SJC to LAS?
- Departures around 7 a.m. have the best record (96% on-time), while departures around 3 p.m. have the worst (67%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SJC to LAS?
- The scheduled SJC–LAS flight time averages 1h 30m over 386 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are SJC 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 SJC to LAS?
- July 2025 was the roughest month in this dataset, with only 74% of arrivals on time. The best was November 2024 at 90%. If your dates are flexible, that 16-point gap is worth planning around.
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Based on 8,845 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.