Carrier route record

F9SAT→LAS

Frontier Airlines · San Antonio to Las Vegas

Flights: 305
Period: September 2025 to August 2026
Share of route: 15%
Carriers: 3

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

Frontier on SAT to LAS sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 305 flights, with a median arrival 11 minutes early.

The US average over the same twelve months is 77.3%, so there is little to separate Frontier on SAT to LAS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

74.8%

Arrivals under 15 minutes late, of 301 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

0.98%

National rate is 1.89%

Whole route

78.8%

Every carrier on SAT to LAS, 2,049 flights

These figures cover 305 flights between September 2025 and August 2026. Beyond the headline rate, 10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Carrier by carrier

Frontier against every carrier on SAT to LAS

Frontier flew 305 of the 2,049 flights on SAT to LAS, about 15% of it. Its 74.8% on time is 4 points worse than the route as a whole, which runs 78.8%. Ranked by on-time rate it is last 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 Airlinesthin sample	157	81.4%	96 min	0.64%	B+
Southwest Airlines	1,587	79.3%	53 min	0.44%	B+
Frontier Airlines (this page)thin sample	305	74.8%	69 min	0.98%	C+

Flight by flight

Frontier flight numbers on SAT to LAS

F9 341721:3275.3% · 267 flights

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 Frontier runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 21 points, against half a point between the best and worst carrier.

5am–8am—
8am–11am—
11am–2pm53 flights84.3%
2pm–5pm89 flights86.4%
5pm–8pm2 flights—
8pm–5am161 flights65.0%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

The best window here is not the first bank but the 2pm–5pm slot at 86.4% on time, ahead of 8pm–5am at 65.0%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8pm–5am window is the busiest, with 161 flights scheduled in it.

Across the year

Frontier on SAT to LAS through the year

Jul–Sep 202529 flights—
Oct–Dec 202572 flights85.9%
Jan–Mar 202662 flights80.6%
Apr–Jun 202680 flights66.2%
Jul–Sep 202662 flights62.9%

Scale runs 55% 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 74.8% on time across 305 flights.

Frontier on SAT to LAS did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.9% on time and its weakest Jul–Sep 2026 at 62.9%, a swing of 23 points on roughly 76 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Saturday is the strongest day at 85.3% on time and Friday the weakest at 63.0%, a spread of 22 points.

Arrival by arrival

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

Frontier on SAT to LAS often beats the schedule: 125 of 301 completed flights, 42%, arrived 15 minutes or more early. The 76 late arrivals split 24 under half an hour, 21 between 30 and 60 minutes, and 31 an hour or more.

15+ min early125 flights41.5%
Within 15 min100 flights33.2%
15–29 min late24 flights8.0%
30–59 min late21 flights7.0%
1–2 hours late20 flights6.6%
2+ hours late11 flights3.7%

Scale runs 0% to 100%.

Share of 301 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 73 departures that left 15 minutes late or more, only 6 made it up before arrival. 9 flights left on time and still arrived late.

The worst days

Worst days for Frontier on SAT to LAS

The latest arrival of the period was on 16 July 2026, 4 hours 11 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in July 2026.

The latest arrivals of Frontier on SAT to LAS in the period
Date	Arrived late by	Largest filed cause
16 July 2026	4 hours 11 minutes	National Airspace System
28 June 2026	4 hours 6 minutes	Late-arriving aircraft
19 June 2026	4 hours 5 minutes	National Airspace System
31 July 2026	3 hours 29 minutes	Late-arriving aircraft
23 July 2026	2 hours 56 minutes	Late-arriving aircraft

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 58% of the 5,210 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
58%
National Airspace System
35%
Carrier
8%

58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,210 reported delay minutes here, that single category outweighs weather by 58 to one. The split is drawn from 5,210 reported delay minutes.

35% 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 1,800 minutes out of 5,210, against a national NAS share of 21%.

Cancellations sit at 0.98% against a national 1.89%, which is ordinary. Diversions add another 0.33%.

Connections and stage length

What a delay here costs

10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

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 is a different operation and performs like one: it runs 81.5% on time across 304 flights, 7 points above 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 7 points of difference.

One caution: this is a thin sample. 305 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 Frontier on SAT to LAS

Put together: treat all of this as provisional. 305 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 74.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 301 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