Carrier route record

DLLAS→AUS

Delta Air Lines · Las Vegas to Austin

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 LAS to AUS draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 365 flights, with a median arrival 3 minutes early.

The national on-time rate over the same period is 77.6%, so Delta on LAS to AUS runs 10 points behind the country as a whole. Across a thousand flights that is about 98 extra late arrivals.

On time

67.8%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

73 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

Whole route

73.5%

Every carrier on LAS to AUS, 2,865 flights

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 13.1% 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 LAS to AUS

Delta flew 365 of the 2,865 flights on LAS to AUS, about 13% of it. Its 67.8% on time is 6 points worse than the route as a whole, which runs 73.5%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from Allegiant at 85.0% to Spirit at 61.5%. 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 LAS to AUS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Allegiant Airthin sample	20	85.0%	83 min	0.00%	A+
Frontier Airlinesthin sample	291	81.8%	64 min	1.37%	B
Southwest Airlines	2,176	73.3%	50 min	0.23%	C+
Delta Air Lines (this page)	365	67.8%	73 min	0.82%	C+
Spirit Airlinesthin sample	13	61.5%	47 min	0.00%	D+

Flight by flight

Delta flight numbers on LAS to AUS

DL 226017:2165.5% · 266 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 LAS to AUS record by time of day without the percentages moving on noise. The headline rate of 67.8% is the reliable figure here.

Across the year

Delta on LAS to AUS through the year

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

July is the worst month at 29.0% on time, 55 points below December, the best at 83.9%. 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 76.5% on time and Monday the weakest at 57.7%. 19 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. Late-arriving aircraft accounts for 58% of the 8,478 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.

Late-arriving aircraft
58%
Carrier
31%
National Airspace System
10%
Extreme weather
2%

58% 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 8,478 reported delay minutes here, that single category outweighs weather by 37 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 8,478 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. 13.1% 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 70.2% 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 LAS to AUS

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 67.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 360 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