Carrier route record

F9LAS→AUS

Frontier Airlines · Las Vegas to Austin

Flights: 291
Period: July 2025 to June 2026
Share of route: 10%
Carriers: 5

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

Frontier on LAS to AUS lands a B, 4 points better than the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 291 flights. The strongest carrier on the route with a full sample, Southwest Airlines, flew 2,176 at 73.3% on time.

Set against the rest of the country, Frontier's LAS to AUS record is 4 points better than the US average of 77.6%. That gap is worth roughly 42 fewer late arrivals for every thousand flights.

On time

81.8%

Arrivals under 15 minutes late, of 286 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

Whole route

73.5%

Every carrier on LAS to AUS, 2,865 flights

These figures cover 291 flights between July 2025 and June 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.

Carrier by carrier

Frontier against every carrier on LAS to AUS

Frontier flew 291 of the 2,865 flights on LAS to AUS, about 10% of it. Its 81.8% on time is 8 points better than the route as a whole, which runs 73.5%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from Allegiant at 85.0% to Spirit at 61.5%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The two carriers here are closely matched: 6 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on LAS to AUS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Allegiant Airthin sample	20	85.0%	83 min	0.00%	A+
Frontier Airlines (this page)thin sample	291	81.8%	64 min	1.37%	B
Southwest Airlines	2,176	73.3%	50 min	0.23%	C+
Delta Air Lines	365	67.8%	73 min	0.82%	C+
Spirit Airlinesthin sample	13	61.5%	47 min	0.00%	D+

No carrier stands out. Southwest tops the table at 73.3%, 6 points clear of the bottom, which is inside the range this kind of sample moves year to year.

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 24 points, against 6 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am46 flights91.1%
8am–11am115 flights85.1%
11am–2pm50 flights75.5%
2pm–5pm44 flights81.8%
5pm–8pm36 flights67.6%
8pm–5am—

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.1% of the time, against 67.6% for the evening window. That is 24 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 115 flights scheduled in it.

Across the year

Frontier on LAS to AUS through the year

Jul–Sep 202568 flights84.8%
Oct–Dec 202577 flights76.6%
Jan–Mar 202677 flights89.3%
Apr–Jun 202669 flights76.5%

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 81.8% on time across 291 flights.

Frontier on LAS to AUS did not run the same all year. Its best quarter was Jan–Mar 2026 at 89.3% on time and its weakest Apr–Jun 2026 at 76.5%, a swing of 13 points on roughly 73 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 89.2% on time and Sunday the weakest at 72.9%. 16 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Frontier 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 3,350 reported delay minutes.

Late-arriving aircraft
38%
National Airspace System
32%
Carrier
30%
Extreme weather
0%

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 3,350 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 3,350 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.1% on time here.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 0.34%.

Connections and stage length

What a delay here costs

7.7% 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 about an hour, which a normal layover absorbs.

The 1,090 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 is a different operation and performs like one: it runs 67.9% on time across 291 flights, 14 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 14 points of difference.

One caution: this is a thin sample. 291 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 LAS to AUS

Put together: treat all of this as provisional. 291 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 81.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 286 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