78% of flights from Las Vegas to San Jose arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 99% of the time; the 9 p.m. ones 61%. Most reliable airline: Delta Air Lines (83%). 6% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for LAS → SJC: when a flight was late, it was under 45 minutes late 60% of the time. About 1 in 17 flights landed an hour or more late, and 1 in 194 three hours or more; 0.4% were cancelled outright.
- On time or early78%
- 15–30 min late8.5%
- 30–60 min late7.3%
- 1–2 hours late4.6%
- 2–3 hours late0.7%
- 3+ hours late0.5%
- Diverted0.0%
- Cancelled0.4%
Share of all 3,693 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Southwest Airlines | 3,275 | 78% | 0.3% | −6 min | 5.8% | +49 min | Southwest Airlines |
| Frontier Airlines | 196 | 79% | 1.0% | −11 min | 7.7% | +66 min | Frontier Airlines |
| Delta Air Lines | 134 | 83% | 0.0% | −4 min | 6.7% | +82 min | SkyWest |
| Spirit Airlines | 76 | — | — | — | — | — | Spirit Airlines |
| Alaska Airlines | 8 | — | — | — | — | — | SkyWest 75%, Horizon Air 25% |
| United Airlines | 4 | — | — | — | — | — | United Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at LAS). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Southwest Airlines | Delta Air Lines |
|---|---|---|
| 5 a.m. | 98% | — |
| 6 a.m. | 99% | — |
| 7 a.m. | 97% | — |
| 8 a.m. | 89% | — |
| 9 a.m. | 88% | — |
| 11 a.m. | 83% | — |
| noon | 76% | 84% |
| 1 p.m. | 83% | — |
| 2 p.m. | 68% | — |
| 3 p.m. | 69% | — |
| 4 p.m. | 77% | — |
| 5 p.m. | 69% | — |
| 6 p.m. | 63% | — |
| 7 p.m. | 74% | — |
| 8 p.m. | 67% | — |
| 9 p.m. | 61% | — |
Last flight of the day
On LAS → SJC, each airline's last flight of the day was cancelled 0.3% of the time, against 0.4% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 0.5% of the time (earlier flights: 0.4%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Southwest Airlines | 9:30 p.m. | 0.3% | 0.5% | 0.3% | first flight 5:45 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
By month
Each calendar month pooled over 2023–2026. Best: November (86%). Worst: July (74%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 608 | 75% | 0.3% |
| Tuesday | 456 | 84% | 0.0% |
| Wednesday | 444 | 86% | 0.0% |
| Thursday | 580 | 74% | 0.0% |
| Friday | 604 | 73% | 1.5% |
| Saturday | 418 | 85% | 0.0% |
| Sunday | 583 | 73% | 0.5% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 6 · airline 4 · air traffic/airport 4
Month by month
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| F9 4103 | 11:39 a.m. | 183 | 78% | 1.1% | −11 min | Frontier Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Feb 17, 2026 | 9 | 11% | 0 |
| May 18, 2026 | 14 | 21% | 0 |
| Nov 18, 2025 | 9 | 22% | 0 |
| Apr 17, 2026 | 12 | 25% | 0 |
| Feb 19, 2026 | 10 | 30% | 0 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Las Vegas or San Jose. None has been clearly more reliable than LAS → SJC.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| LAS → SJC (this route) | 3,693 | 78% | 0.4% |
| LAS → OAK Las Vegas Harry Reid to Oakland | 3,228 | 71% | 0.4% |
| LAS → SFO Las Vegas Harry Reid to San Francisco | 6,142 | 58% | 0.8% |
Questions
How often are flights from LAS to SJC on time?
78% of 3,693 scheduled flights from Las Vegas, NV to San Jose, CA arrived within 15 minutes of schedule between September 2025 and August 2026. 0.4% were cancelled.
What is the best time of day to fly LAS to SJC?
Flights scheduled to leave at 6 a.m. were the most reliable (99% on time). The 9 p.m. departures were the least (61%).
Which airline is most on time from LAS to SJC?
Delta Air Lines: 83% of its 134 flights on the route arrived on time. Southwest Airlines: 78%. Frontier Airlines: 79%.
What month has the most delays from LAS to SJC?
July (74% on time). The best month is November (86%), over 2023–2026.
Is the last flight of the day from LAS to SJC more likely to be cancelled?
No, the opposite. Each airline's last LAS–SJC flight of the day was cancelled 0.3% of the time over the past year, against 0.4% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- SJC → LAS (return)
- Las Vegas Harry Reid (LAS) delays by hour
- Flights into San Jose (SJC)
- Southwest Airlines on-time record
- Frontier Airlines on-time record
- Delta Air Lines on-time record
- Spirit Airlines on-time record
- Alaska Airlines on-time record
- United Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.