Route reliability record
LAS→AUS
Las Vegas to Austin
- Flights
- 2,865
- Period
- September 2025 to August 2026
- Distance
- 1,090 mi
- Carriers
- 4
This route sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 2,865 LAS to AUS flights, of which Southwest Airlines flew 2,187 at 72.3% on time.
Best time to fly LAS to AUS: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 90.2% of the time and Wednesday flights 83.1%, against 72.8% for the route overall.
The national on-time rate over the same period is 77.3%, so this route runs 5 points behind the country as a whole. Across a thousand flights that is about 45 extra late arrivals.
Key figures
On time
72.8%
Arrivals under 15 minutes late, of 2,843 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.45%
National rate is 1.89%
Best carrier
Southwest
72.3% on time across 2,187 flights
These figures cover 2,865 flights between September 2025 and August 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Which airline is most reliable on LAS to AUS
The two carriers here are closely matched: 3 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Frontier Airlinesthin sample | 297 | 81.6% | 75 min | 1.01% | B |
| Allegiant Airthin sample | 16 | 81.2% | 92 min | 0.00% | B+ |
| Southwest Airlines | 2,187 | 72.3% | 49 min | 0.37% | C+ |
| Delta Air Lines | 365 | 69.0% | 77 min | 0.55% | C+ |
No carrier stands out. Southwest tops the table at 72.3%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.
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.
Best ways to make this trip
The most reliable ways to fly Las Vegas to Austin
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. LAS → AUSLas Vegas to Austin | Southwest Airlines | 72.0% | 72.3% | 0.37% | 5am–8am, Wed | — |
| 2. LAS → AUSLas Vegas to Austin | Delta Air Lines | 68.6% | 69.0% | 0.55% | 5pm–8pm, Tue | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 29 points, against 3 points between the best and worst carrier.
- 5am–8am603 flights90.2%
- 8am–11am481 flights82.0%
- 11am–2pm428 flights72.3%
- 2pm–5pm490 flights61.7%
- 5pm–8pm763 flights62.2%
- 8pm–5am100 flights62.0%
Scale runs 55% to 95%.
Book the early departure. Flights leaving between 5am–8am arrive on time 90.2% of the time, against 61.7% for the afternoon window. That is 29 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 763 flights scheduled in it.
Explore
Filter LAS to AUS by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On LAS to AUS, the best departure window is 5am–8am at 90.2% on time and the worst is 2pm–5pm at 61.7%, a wide gap of 28.5 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am90.2%
- 8–11am82.0%
- 11am–2pm72.3%
- 2–5pm61.7%
- 5–8pm62.2%
- 8pm–5am62.0%
best all US flightsScale 55% to 95%.
Across the year
When delays peak on this route
This route's year swings by 19 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
June is the worst month at 64.7% on time, 19 points below December, the best at 83.8%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 259 flights.
Across the week, Wednesday is the strongest day at 83.1% on time and Friday the weakest at 65.8%, a spread of 17 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 50% of the 43,000 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 33%Carrier
- 15%National Airspace System
- 2%Extreme weather
- 0%Security
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 43,000 reported delay minutes here, that single category outweighs weather by 27 to one. The split is drawn from 42,629 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 90.2% on time here.
Cancellations are rare at 0.45%, 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 actually costs
8.1% 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 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.
The return leg runs 73.6% on time across 2,882 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.
The sample behind these figures is 2,865 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in AUS after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. December runs 83.8% on time and June 64.7%, a swing of 19 points. If the dates move at all, move them out of June before you think about anything else. 2,843 completed flights over 12 months sit behind that.
Common questions
LAS to AUS questions
How often is LAS to AUS delayed?
Roughly one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 27.2% of the 2,865 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on LAS to AUS?
Southwest Airlines leads at 72.3% on time across 2,187 flights. Delta Air Lines is at the other end on 69.0%, a gap of 3 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on LAS to AUS?
The 5am–8am departure window is the strongest at 90.2% on time. The 2pm–5pm window is the weakest at 61.7%, 29 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are June delays on LAS to AUS?
June is the weakest month at 64.7% on time, compared with 83.8% in December. Across the year that is 19 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- AUS to LAS — the return legseparate record
- Harry Reid International (LAS) delay statistics
- Austin-Bergstrom International (AUS) delay statistics
- Frontier Airlines on LAS to AUS81.6%
- Southwest Airlines on LAS to AUS72.3%
- Delta Air Lines on LAS to AUS69.0%
- LAS to LAX, a related route77.9%
- DEN to AUS, a related route76.2%
- LAS to DEN, a related route76.5%
- Frontier Airlines on-time record81.6%
- Allegiant Air on-time record81.2%
- Southwest Airlines on-time record72.3%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. LAS to AUS and AUS to LAS are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed LAS to AUS’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.