Carrier route record

NKLAS→SAT

Spirit Airlines · Las Vegas to San Antonio

Flights: 212
Period: July 2025 to June 2026
Share of route: 10%
Carriers: 3

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

Spirit on LAS to SAT lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 212 flights, with a median arrival 9 minutes early.

Set against the rest of the country, Spirit's LAS to SAT record is 5 points better than the US average of 77.6%. That gap is worth roughly 49 fewer late arrivals for every thousand flights.

On time

82.5%

Arrivals under 15 minutes late, of 211 completed flights

Avg delay

94 min

Across delayed arrivals only, not all flights

Cancelled

0.47%

National rate is 1.81%

Whole route

75.8%

Every carrier on LAS to SAT, 2,053 flights

These figures cover 212 flights between July 2025 and June 2026. The median arrival is 9 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 LAS to SAT

Spirit flew 212 of the 2,053 flights on LAS to SAT, about 10% of it. Its 82.5% on time is 7 points better than the route as a whole, which runs 75.8%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Frontier at 85.1% to Southwest at 73.3%. One 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 LAS to SAT
Airline	Flights	On time	Avg delay	Cancelled	Grade
Frontier Airlinesthin sample	277	85.1%	62 min	0.72%	A+
Spirit Airlines (this page)thin sample	212	82.5%	94 min	0.47%	B+
Southwest Airlines	1,564	73.3%	50 min	0.19%	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 23 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–8am15 flights—
8am–11am36 flights94.4%
11am–2pm46 flights87.0%
2pm–5pm61 flights71.7%
5pm–8pm28 flights—
8pm–5am26 flights—

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 94.4% of the time, against 71.7% for the afternoon window. That is 23 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 61 flights scheduled in it.

Across the year

Spirit on LAS to SAT through the year

Jul–Sep 202597 flights76.0%
Oct–Dec 2025109 flights89.9%
Jan–Mar 20266 flights—

Scale runs 70% to 95%. 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 82.5% on time across 212 flights.

Split by quarter, Spirit on LAS to SAT logged 97 flights in Jul–Sep 2025, 109 flights in Oct–Dec 2025 and 6 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 82.5% annual figure is the one to use.

Across the week, Thursday is the strongest day at 87.5% on time and Sunday the weakest at 72.7%. 15 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Spirit runs late on this route

One category carries most of the weight here. National Airspace System accounts for 43% of the 3,459 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
43%
Carrier
35%
Late-arriving aircraft
22%
Extreme weather
0%

43% 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 1,488 minutes out of 3,459, against a national NAS share of 21%. The split is drawn from 3,459 reported delay minutes.

The largest share of delay minutes, 35%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,205 of the 3,459 delay minutes reported here.

Cancellations are rare at 0.47%, 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

6.6% 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 an hour and a half, which a normal layover absorbs.

The 1,069 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg runs 83.7% on time across 210 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. 212 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 LAS to SAT

Put together: treat all of this as provisional. 212 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 82.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 211 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