Carrier route record

DLAUS→LAS

Delta Air Lines · Austin to Las Vegas

Flights: 365
Period: July 2025 to June 2026
Share of route: 13%
Carriers: 5

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

Delta on AUS to LAS sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 365 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.6%, so Delta on AUS to LAS runs 7 points behind the country as a whole. Across a thousand flights that is about 74 extra late arrivals.

On time

70.2%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

Whole route

73.8%

Every carrier on AUS to LAS, 2,866 flights

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 10.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

Delta against every carrier on AUS to LAS

Delta flew 365 of the 2,866 flights on AUS to LAS, about 13% of it. Its 70.2% on time is 4 points worse than the route as a whole, which runs 73.8%. Ranked by on-time rate it is number three of five carriers on the route, where the range runs from Allegiant at 85.0% to Frontier at 67.9%. Three 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 AUS to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Allegiant Airthin sample	20	85.0%	86 min	0.00%	A+
Southwest Airlines	2,177	75.1%	49 min	0.32%	B+
Delta Air Lines (this page)	365	70.2%	85 min	0.82%	C+
Spirit Airlinesthin sample	13	69.2%	40 min	0.00%	C+
Frontier Airlinesthin sample	291	67.9%	74 min	1.37%	C

Flight by flight

Delta flight numbers on AUS to LAS

DL 226015:2572.9% · 268 flights

Departure window

When Delta runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 365 flights.

There are not enough flights in each departure window to split Delta's AUS to LAS record by time of day without the percentages moving on noise. The headline rate of 70.2% is the reliable figure here.

Across the year

Delta on AUS to LAS through the year

Darker means more delays. Figures are on-time percentages.December best, August worst

August is the worst month at 46.7% on time, 40 points below December, the best at 87.1%. 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. January was the busiest month here, with 31 flights.

Across the week, Tuesday is the strongest day at 79.2% on time and Friday the weakest at 58.8%. 20 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Delta runs late on this route

One category carries most of the weight here. Carrier accounts for 51% of the 9,160 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.

Carrier
51%
Late-arriving aircraft
33%
National Airspace System
12%
Extreme weather
3%

The largest share of delay minutes, 51%, 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 4,715 of the 9,160 delay minutes reported here. The split is drawn from 9,160 reported delay minutes.

Cancellations are rare at 0.82%, 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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 runs 67.8% on time across 365 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. 365 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 Delta on AUS to LAS

Put together: treat all of this as provisional. 365 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 70.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 362 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