Carrier route record
OOLAX→SJC
SkyWest Airlines · Los Angeles to San Jose
- Flights
- 1,805
- Period
- September 2025 to August 2026
- Share of route
- 40%
- Carriers
- 6
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on LAX to SJC earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 1,805 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 650 at 86.9% on time.
Set against the rest of the country, SkyWest's LAX to SJC record is 13 points better than the US average of 77.3%. That gap is worth roughly 134 fewer late arrivals for every thousand flights.
Key figures
On time
90.7%
Arrivals under 15 minutes late, of 1,798 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.39%
National rate is 1.89%
Whole route
85.6%
Every carrier on LAX to SJC, 4,471 flights
These figures cover 1,805 flights between September 2025 and August 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
SkyWest against every carrier on LAX to SJC
SkyWest flew 1,805 of the 4,471 flights on LAX to SJC, about 40% of it. Its 90.7% on time is 5 points better than the route as a whole, which runs 85.6%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from United at 100.0% to American at 66.7%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 86.9% of the time; Southwest Airlines manages 80.6%. Sample sizes sit next to every figure, because a two-point gap across 1,871 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlinesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| SkyWest Airlines (this page) | 1,805 | 90.7% | 58 min | 0.39% | A+ |
| Delta Air Lines | 650 | 86.9% | 59 min | 2.15% | A |
| Southwest Airlines | 1,871 | 80.6% | 50 min | 0.91% | B+ |
| Frontier Airlinesthin sample | 138 | 80.5% | 50 min | 3.62% | B− |
| American Airlinesthin sample | 6 | 66.7% | 39 min | 0.00% | C+ |
Delta leads Southwest by 6 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
SkyWest flight numbers on LAX to SJC
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When SkyWest runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 1,805 flights.
- 5am–8am124 flights94.2%
- 8am–11am226 flights96.0%
- 11am–2pm540 flights91.5%
- 2pm–5pm230 flights90.0%
- 5pm–8pm400 flights88.2%
- 8pm–5am285 flights87.2%
Scale runs 80% to 100%.
Book the morning departure. Flights leaving between 8am–11am arrive on time 96.0% of the time, against 87.2% for the overnight window. That is 9 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 540 flights scheduled in it.
Across the year
SkyWest on LAX to SJC through the year
December is the weak month at 83.8% on time, against 95.8% in November. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. September was the busiest month here, with 270 flights.
Across the week, Tuesday is the strongest day at 92.8% on time and Sunday the weakest at 87.4%, a spread of 5 points.
Arrival by arrival
How late SkyWest on LAX to SJC runs when it is late
SkyWest on LAX to SJC often beats the schedule: 771 of 1,798 completed flights, 43%, arrived 15 minutes or more early. The 168 late arrivals split 65 under half an hour, 46 between 30 and 60 minutes, and 57 an hour or more.
- 15+ min early771 flights42.9%
- Within 15 min859 flights47.8%
- 15–29 min late65 flights3.6%
- 30–59 min late46 flights2.6%
- 1–2 hours late38 flights2.1%
- 2+ hours late19 flights1.1%
Scale runs 0% to 100%.
Share of 1,798 completed flights by arrival against schedule.
43 of 204 late departures made up the time and arrived on time, 21% of them. Only 7 left on time and still arrived late.
The worst days
Worst days for SkyWest on LAX to SJC
The latest arrival of the period was on 26 December 2025, 5 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Four of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 December 2025 | 5 hours 38 minutes | Carrier |
| 12 October 2025 | 4 hours 46 minutes | Carrier |
| 26 December 2025 | 4 hours 37 minutes | National Airspace System |
| 28 December 2025 | 4 hours 36 minutes | Carrier |
| 26 December 2025 | 3 hours 55 minutes | Carrier |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 63% of the 9,778 delay minutes carriers reported here, and the remaining four split what is left.
- 63%Carrier
- 15%Extreme weather
- 11%Late-arriving aircraft
- 11%National Airspace System
Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 9,778 reported delay minutes.
The largest share of delay minutes, 63%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,175 of the 9,778 delay minutes reported here.
Cancellations are rare at 0.39%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 3.2% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 308 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg runs 91.7% on time across 1,809 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,805 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking SkyWest on LAX to SJC
Put together: the calendar is the biggest lever here, not the carrier or the hour. November runs 95.8% on time and December 83.8%, a swing of 12 points. If the dates move at all, move them out of December before you think about anything else. 1,798 completed flights over 12 months sit behind that.
Related
Where to go next
- LAX to SJC, every carrier
- SkyWest on SJC to LAX, the return leg
- Delta Air Lines on LAX to SJC86.9%
- Southwest Airlines on LAX to SJC80.6%
- Frontier Airlines on LAX to SJC80.5%
- SkyWest Airlines network-wide record
- Los Angeles International (LAX) delay statistics
- Norman Y. Mineta San Jose International (SJC) delay statistics
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.