Carrier route record

OOSJC→LAS

SkyWest Airlines · San Jose to Las Vegas

Flights: 202
Period: July 2025 to June 2026
Share of route: 5%
Carriers: 5

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.

SkyWest on SJC to LAS lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 202 flights, with a median arrival 8 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate SkyWest on SJC to LAS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

80.2%

Arrivals under 15 minutes late, of 202 completed flights

Avg delay

79 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

Whole route

79.7%

Every carrier on SJC to LAS, 3,829 flights

These figures cover 202 flights between July 2025 and June 2026. The median arrival is 8 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.

Carrier by carrier

SkyWest against every carrier on SJC to LAS

SkyWest flew 202 of the 3,829 flights on SJC to LAS, about 5% of it. Its 80.2% on time is about level with the route as a whole at 79.7%. Ranked by on-time rate it is number three of five carriers on the route, where the range runs from United at 100.0% to Frontier at 72.4%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on SJC to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlinesthin sample	2	100.0%	—	0.00%	A+
Spirit Airlinesthin sample	199	86.8%	82 min	0.50%	A+
SkyWest Airlines (this page)thin sample	202	80.2%	79 min	0.00%	B+
Southwest Airlines	3,241	79.6%	55 min	0.46%	B+
Frontier Airlinesthin sample	185	72.4%	62 min	2.16%	C

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 202 flights.

5am–8am—
8am–11am2 flights—
11am–2pm45 flights77.8%
2pm–5pm155 flights80.6%
5pm–8pm—
8pm–5am—

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

The 2pm–5pm window is the strongest at 80.6% on time. The full set of windows spans 3 points.

Across the year

SkyWest on SJC to LAS through the year

Jul–Sep 202592 flights76.1%
Oct–Dec 202592 flights87.0%
Jan–Mar 202618 flights—

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 80.2% on time across 202 flights.

Split by quarter, SkyWest on SJC to LAS logged 92 flights in Jul–Sep 2025, 92 flights in Oct–Dec 2025 and 18 flights in Jan–Mar 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 80.2% annual figure is the one to use.

Across the week, Tuesday is the strongest day at 80.0% on time and Friday the weakest at 60.0%. 20 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,162 reported delay minutes.

National Airspace System
40%
Carrier
30%
Extreme weather
29%
Late-arriving aircraft
1%

Extreme weather accounts for 29% 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 4.7 times the usual weather exposure. The split is drawn from 3,162 reported delay minutes.

40% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,251 minutes out of 3,162, against a national NAS share of 21%.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

7.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

At 386 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 2pm–5pm window matters as much as it does.

The return leg runs 81.2% on time across 202 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.

One caution: this is a thin sample. 202 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking SkyWest on SJC to LAS

Put together: treat all of this as provisional. 202 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 80.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 202 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures