Las Vegas (LAS) to San Jose (SJC): On-Time Performance
Data through July 2026
When you fly LAS to SJC matters as much as anything else about the booking: the route swung from 90% on-time in January 2025 to just 69% in June 2026. Across the full period the route averages 81% 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
- 81%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 10
- last 12 months
- Duration
- 1h 33m
- scheduled
- Distance
- 386 mi
Best airline from LAS to SJC
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 82% | 11 min | 1.1% | 1,299 |
| SkyWest Airlines | 82% | 20 min | 0.0% | 257 |
| Southwest Airlines | 81% | 11 min | 0.3% | 6,856 |
| Frontier Airlines | 77% | 16 min | 0.9% | 459 |
Monthly on-time trend
Best time to fly from LAS to SJC
Aim for departures around 5 a.m. (98% on-time); avoid 9 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 12 min |
| Tuesday | 87% | 9 min |
| Wednesdaybest | 88% | 8 min |
| Thursday | 77% | 14 min |
| Friday | 78% | 14 min |
| Saturday | 88% | 8 min |
| Sunday | 75% | 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 aircraft53%
- Airline operations35%
- National airspace system11%
- Weather1%
Frequently asked questions
- How often are flights from LAS to SJC delayed?
- 19% of LAS–SJC 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 11 minutes.
- Which airline is most reliable from LAS to SJC?
- Spirit Airlines has the best on-time record on this route at 82%, based on 1,299 flights. 4 airlines flew LAS–SJC frequently enough to compare in this period.
- What is the best time of day to fly from LAS to SJC?
- Departures around 5 a.m. have the best record (98% on-time), while departures around 9 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 LAS to SJC?
- The scheduled LAS–SJC flight time averages 1h 33m over 386 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are LAS to SJC flights cancelled?
- 0.4% 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 SJC?
- June 2026 was the roughest month in this dataset, with only 69% of arrivals on time. The best was January 2025 at 90%. If your dates are flexible, that 20-point gap is worth planning around.
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Based on 8,882 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.