Route profile
LAS→SJC
Flight reliability, delays and best times to fly from Las Vegas to San Jose, 386 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 80% of comparable major US routes (4,598 compared)
Calculated from 13,257 flights. How this is calculated
LAS → SJC arrives on time 80.6% of the time; the return trip, SJC → LAS, arrives on time 81.1% of the time.
LAS → SJC spends 20.3 minutes on the ground on a 386-mile trip: 16.0 minutes from pushback to wheels-up at LAS and 4.3 minutes from touchdown to gate at SJC.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Why LAS → SJC flights are cancelled
July 2023 – July 2026
LAS → SJC cancelled 78 of 13,257 scheduled flights — about 1 in every 170. The reason filed most often was the airline, 42.3% of the cancellations coded on this route — about 1 in every 402 scheduled flights.
Share of cancellations
Of 78 cancelled departures carrying a reason code.
What each reason means
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
33 cancellations, 42.3% of the total.
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
32 cancellations, 41.0% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
13 cancellations, 16.7% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
78 coded cancellations were recorded on LAS → SJC; the section appears from 50.
When it goes wrong
July 2023 – July 2026
36 min late
against a median of 7 min early
Percentiles over 13,257 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at SJC after arriving from LAS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 34% | Likely to miss |
| 45 min | 19% | High risk |
| 60 min | 12% | Some risk |
| 90 min | 5.3% | Some risk |
| 120 min | 2.6% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.59% of the time and diverts 0.01% of the time, which a late arrival never shows up in.
Chance of missing is the share of 13,178 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 36 minutes late (90th-percentile gate arrival delay), over 13,257 operations.
Any other layover length: connection checker.
Best time to fly
LAS → SJC flights departing 5–9 AM arrived on time 95.3% of the time, against 70.3% for 9 PM–5 AM departures, a gap of 25.0 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 97.1% on time from 414 flights
- 6 AM: 97.4% on time from 621 flights
- 7 AM: 95.9% on time from 947 flights
- 8 AM: 92.3% on time from 819 flights
- 9 AM: 89.0% on time from 1,022 flights
- 10 AM: 88.0% on time from 670 flights
- 11 AM: 82.4% on time from 602 flights
- 12 PM: 79.4% on time from 1,013 flights
- 1 PM: 80.6% on time from 578 flights
- 2 PM: 75.6% on time from 674 flights
- 3 PM: 72.9% on time from 759 flights
- 4 PM: 75.5% on time from 781 flights
- 5 PM: 73.8% on time from 695 flights
- 6 PM: 69.5% on time from 862 flights
- 7 PM: 74.0% on time from 694 flights
- 8 PM: 69.9% on time from 932 flights
- 9 PM: 69.5% on time from 874 flights
- 10 PM: 72.6% on time from 300 flights
- 11 PM: too few flights to score
Why LAS → SJC runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for LAS → SJC. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on LAS → SJC, at 53.0%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 95.3% of the time and 9 PM–5 AM departures 70.3%.
How this route holds up in bad weather
July 2023 – July 2026
The harder-hit end is the one the flight leaves from, where a cancellation keeps it from departing at all. Bad weather cancels 2.4 times the normal rate at LAS against 1.6 times at SJC. Cancelled in bad weather against normal hours: LAS 2.0% against 0.8%, SJC 1.0% against 0.6%. Flights that did leave LAS in bad weather arrived on time 58.5% of the time, against 78.5% in normal hours.
Bad weather and normal hours at the airports
Scheduled departures, July 2023 – July 2026| Departures from | LAS | SJC |
|---|---|---|
| Cancelled in bad weather | 2.0% | 1.0% |
| Cancelled in normal hours | 0.8% | 0.6% |
| Arrived on time, bad weather | 58.5% | 87.4% |
| Arrived on time, normal hours | 78.5% | 83.5% |
| Departures in bad weather | 14,522 | 4,322 |
Spirit Airlines (3.8% cancelled against 2.3% for the other carriers at LAS) and Frontier Airlines (4.0% cancelled against 1.8% for the other carriers at LAS) cancelled more departures from LAS in bad weather than the other carriers there did in the same months. None of the route’s other carriers was clearly better. One more carrier flies this route but has too few bad-weather departures from LAS to compare.
This route’s airlines in bad weather at LAS
All departures from LAS| Airline | Bad-weather departures | Cancelled | Other carriers |
|---|---|---|---|
| Southwest Airlines | 6,925 | 2.0%about level | 2.1% |
| Spirit Airlines | 1,398 | 3.8%above the others | 2.3% |
| Frontier Airlines | 943 | 4.0%above the others | 1.8% |
These are airport figures, not route figures: every scheduled departure from LAS and SJC, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from LAS on every route.
Weather source and limits. In full: LAS (airlines), SJC, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Southwest Airlines | 10,441 | 80.3% | 0.57% | -7 min | 5.1% |
| Spirit Airlines | 2,077 | 83.0% | 0.67% | -9 min | 5.8% |
| Frontier Airlines | 459 | 76.9% | 0.87% | -7 min | 8.6% |
| SkyWest Airlines | 257 | 81.7% | 0.00% | -5 min | 8.6% |
Southwest Airlines flew 78.9% of the 13,234 flights listed.
Spirit Airlines arrived on time 6.1 percentage points more often than Frontier Airlines on this route.
Other ways to fly Las Vegas to San Francisco
Airport pairs in the same two city markets, as the DOT defines them.
LAS → SJC is the most reliable pairing for this journey at 80.6% on time, against 66.4% for LAS → SFO.
Weekly and seasonal patterns
By day of week
Saturday is historically the most reliable day and Sunday the least, a gap of 11.9 percentage points.
By month
- Jan: 84.6%
- Feb: 83.2%
- Mar: 83.8%
- Apr: 82.4%
- May: 79.4%
- Jun: 75.5%
- Jul: 73.5%
- Aug: 79.5%
- Sep: 79.1%
- Oct: 80.2%
- Nov: 85.9%
- Dec: 84.1%
July is historically the weakest month and November the strongest, a spread of 12.4 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 68.6% from 383 flights
- August 2023: 73.3% from 413 flights
- September 2023: 76.2% from 376 flights
- October 2023: 78.0% from 366 flights
- November 2023: 86.3% from 368 flights
- December 2023: 89.4% from 380 flights
- January 2024: 77.4% from 352 flights
- February 2024: 81.5% from 320 flights
- March 2024: 84.0% from 334 flights
- April 2024: 84.9% from 345 flights
- May 2024: 81.4% from 379 flights
- June 2024: 79.9% from 359 flights
- July 2024: 73.8% from 388 flights
- August 2024: 83.6% from 414 flights
- September 2024: 81.9% from 404 flights
- October 2024: 84.6% from 416 flights
- November 2024: 88.0% from 399 flights
- December 2024: 85.7% from 420 flights
- January 2025: 89.8% from 392 flights
- February 2025: 86.6% from 353 flights
- March 2025: 84.3% from 351 flights
- April 2025: 84.5% from 373 flights
- May 2025: 82.2% from 410 flights
- June 2025: 76.1% from 403 flights
- July 2025: 74.9% from 380 flights
- August 2025: 81.6% from 381 flights
- September 2025: 79.0% from 375 flights
- October 2025: 76.8% from 315 flights
- November 2025: 82.7% from 313 flights
- December 2025: 75.8% from 318 flights
- January 2026: 86.1% from 303 flights
- February 2026: 80.9% from 267 flights
- March 2026: 82.9% from 296 flights
- April 2026: 76.8% from 289 flights
- May 2026: 73.3% from 304 flights
- June 2026: 69.4% from 303 flights
- July 2026: 77.1% from 315 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 78.6% against 83.5% in the 12 months before — declining by 4.9 percentage points.
Data and methodology
Calculated by FlyerIntel from 13,257 LAS → SJC flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed