Carrier route record

NKSAT→LAS

Spirit Airlines · San Antonio to Las Vegas

Flights: 157
Period: September 2025 to August 2026
Share of route: 8%
Carriers: 3

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

Spirit on SAT to LAS lands a B+, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 157 flights, with a median arrival 12 minutes early.

Set against the rest of the country, Spirit's SAT to LAS record is 4 points better than the US average of 77.3%. That gap is worth roughly 41 fewer late arrivals for every thousand flights.

On time

81.4%

Arrivals under 15 minutes late, of 156 completed flights

Avg delay

96 min

Across delayed arrivals only, not all flights

Cancelled

0.64%

National rate is 1.89%

Whole route

78.8%

Every carrier on SAT to LAS, 2,049 flights

These figures cover 157 flights between September 2025 and August 2026. The median arrival is 12 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.

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Carrier by carrier

Spirit against every carrier on SAT to LAS

Spirit flew 157 of the 2,049 flights on SAT to LAS, about 8% of it. Its 81.4% on time is 3 points better than the route as a whole, which runs 78.8%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Spirit at 81.4% to Frontier at 74.8%. 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 SAT to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlines (this page)thin sample	157	81.4%	96 min	0.64%	B+
Southwest Airlines	1,587	79.3%	53 min	0.44%	B+
Frontier Airlinesthin sample	305	74.8%	69 min	0.98%	C+

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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 20 points, against half a point between the best and worst carrier.

5am–8am46 flights91.3%
8am–11am—
11am–2pm10 flights—
2pm–5pm19 flights—
5pm–8pm46 flights71.7%
8pm–5am36 flights71.4%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.3% of the time, against 71.4% for the overnight window. That is 20 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 46 flights scheduled in it.

Across the year

Spirit on SAT to LAS through the year

Jul–Sep 202544 flights65.1%
Oct–Dec 2025107 flights87.9%
Jan–Mar 20266 flights—

Scale runs 55% 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 81.4% on time across 157 flights.

Split by quarter, Spirit on SAT to LAS logged 44 flights in Jul–Sep 2025, 107 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 81.4% annual figure is the one to use.

Arrival by arrival

How late Spirit on SAT to LAS runs when it is late

Spirit on SAT to LAS often beats the schedule: 69 of 156 completed flights, 44%, arrived 15 minutes or more early. The 29 late arrivals split 10 under half an hour, 9 between 30 and 60 minutes, and 10 an hour or more.

15+ min early69 flights44.2%
Within 15 min58 flights37.2%
15–29 min late10 flights6.4%
30–59 min late9 flights5.8%
1–2 hours late4 flights2.6%
2+ hours late6 flights3.8%

Scale runs 0% to 100%.

Share of 156 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 30 departures that left 15 minutes late or more, only 3 made it up before arrival. Only 2 left on time and still arrived late.

The worst days

Worst days for Spirit on SAT to LAS

The latest arrival of the period was on 17 September 2025, 14 hours 42 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in September 2025.

The latest arrivals of Spirit on SAT to LAS in the period
Date	Arrived late by	Largest filed cause
17 September 2025	14 hours 42 minutes	National Airspace System
3 December 2025	4 hours 12 minutes	Late-arriving aircraft
12 September 2025	2 hours 57 minutes	Late-arriving aircraft
2 January 2026	2 hours 43 minutes	Carrier
28 September 2025	2 hours 40 minutes	Carrier

Delay causes

Why Spirit runs late on this route

National Airspace System accounts for 43% of the 2,771 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
43%
Late-arriving aircraft
36%
Carrier
20%

36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,771 reported delay minutes here, that single category outweighs weather by 36 to one. The split is drawn from 2,771 reported delay minutes.

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 1,205 minutes out of 2,771, against a national NAS share of 21%.

Cancellations are rare at 0.64%, 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

6.4% of arrivals land an hour or more late, close to the national 8.3%, so 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.

The return leg runs 83.5% on time across 159 flights, within 2 points 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. 157 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 SAT to LAS

Put together: treat all of this as provisional. 157 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 81.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 156 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures