Carrier route record

NKSJC→LAS

Spirit Airlines · San Jose to Las Vegas

Flights: 199
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 Spirit Airlines.

Spirit on SJC to LAS earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 199 flights, with a median arrival 11 minutes early.

Set against the rest of the country, Spirit's SJC to LAS record is 9 points better than the US average of 77.6%. That gap is worth roughly 92 fewer late arrivals for every thousand flights.

On time

86.8%

Arrivals under 15 minutes late, of 197 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

0.50%

National rate is 1.81%

Whole route

79.7%

Every carrier on SJC to LAS, 3,829 flights

These figures cover 199 flights between July 2025 and June 2026. The median arrival is 11 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

Spirit against every carrier on SJC to LAS

Spirit flew 199 of the 3,829 flights on SJC to LAS, about 5% of it. Its 86.8% on time is 7 points better than the route as a whole, which runs 79.7%. Ranked by on-time rate it is number two 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 Airlines (this page)thin sample	199	86.8%	82 min	0.50%	A+
SkyWest Airlinesthin 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 Spirit runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 18 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am94 flights93.5%
8am–11am—
11am–2pm54 flights85.2%
2pm–5pm51 flights76.0%
5pm–8pm—
8pm–5am—

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 93.5% of the time, against 76.0% for the afternoon window. That is 18 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 94 flights scheduled in it.

Across the year

Spirit on SJC to LAS through the year

Jul–Sep 2025190 flights86.2%
Oct–Dec 20259 flights—

Scale runs 80% 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 86.8% on time across 199 flights.

Split by quarter, Spirit on SJC to LAS logged 190 flights in Jul–Sep 2025 and 9 flights in Oct–Dec 2025. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 86.8% annual figure is the one to use.

Delay causes

Why Spirit runs late on this route

One category carries most of the weight here. National Airspace System accounts for 55% of the 2,123 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

National Airspace System
55%
Late-arriving aircraft
38%
Carrier
7%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,123 reported delay minutes here, that single category outweighs weather by 38 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,123 reported delay minutes.

55% 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 1,166 minutes out of 2,123, against a national NAS share of 21%.

Cancellations are rare at 0.50%, below the national 1.81% 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 4.6% land an hour or more behind schedule, against 8.1% 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 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 5am–8am window matters as much as it does.

The return leg is a different operation and performs like one: it runs 81.2% on time across 198 flights, 6 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 6 points of difference.

One caution: this is a thin sample. 199 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 Spirit on SJC to LAS

Put together: treat all of this as provisional. 199 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 86.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 197 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