Carrier route record

OOAUS→SLC

SkyWest Airlines · Austin to Salt Lake City

Flights: 233
Period: July 2025 to June 2026
Share of route: 13%
Carriers: 3

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

SkyWest on AUS to SLC earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 233 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,081 at 86.5% on time.

Set against the rest of the country, SkyWest's AUS to SLC record is 10 points better than the US average of 77.6%. That gap is worth roughly 102 fewer late arrivals for every thousand flights.

On time

87.8%

Arrivals under 15 minutes late, of 229 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

1.29%

National rate is 1.81%

Whole route

82.4%

Every carrier on AUS to SLC, 1,784 flights

These figures cover 233 flights between July 2025 and June 2026. The median arrival is 6 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

SkyWest against every carrier on AUS to SLC

SkyWest flew 233 of the 1,784 flights on AUS to SLC, about 13% of it. Its 87.8% on time is 5 points better than the route as a whole, which runs 82.4%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from SkyWest at 87.8% to Southwest at 70.6%.

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 86.5% of the time; Southwest Airlines manages 70.6%. Sample sizes sit next to every figure, because a two-point gap across 470 flights means less than a ten-point one.

On-time performance by carrier on AUS to SLC
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)thin sample	233	87.8%	72 min	1.29%	A
Delta Air Lines	1,081	86.5%	93 min	0.74%	A+
Southwest Airlines	470	70.6%	58 min	0.21%	C+

The spread between Delta and Southwest is 16 points, wide enough that it should decide the booking. On a hundred trips that is 16 more arrivals inside the on-time window.

Departure window

When SkyWest 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 233 flights.

5am–8am154 flights90.1%
8am–11am—
11am–2pm—
2pm–5pm79 flights83.3%
5pm–8pm—
8pm–5am—

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

The early departures do better, though not dramatically: 90.1% on time for the 5am–8am window against 83.3% for 2pm–5pm. Worth taking if the schedule allows, not worth an extra connection. The 5am–8am window is the busiest, with 154 flights scheduled in it.

Across the year

SkyWest on AUS to SLC through the year

Jul–Sep 202554 flights90.7%
Oct–Dec 202543 flights93.0%
Jan–Mar 202647 flights88.6%
Apr–Jun 202689 flights83.0%

Scale runs 75% to 100%. 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 87.8% on time across 233 flights.

SkyWest on AUS to SLC did not run the same all year. Its best quarter was Oct–Dec 2025 at 93.0% on time and its weakest Apr–Jun 2026 at 83.0%, a swing of 10 points on roughly 58 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, Sunday is the strongest day at 97.8% on time and Thursday the weakest at 79.1%. 19 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

One category carries most of the weight here. Carrier accounts for 80% of the 2,009 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
80%
National Airspace System
16%
Extreme weather
4%

The largest share of delay minutes, 80%, 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 1,615 of the 2,009 delay minutes reported here. The split is drawn from 2,009 reported delay minutes.

Cancellations sit at 1.29% against a national 1.81%, which is ordinary. Diversions add another 0.43%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 3.5% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 1,086 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 87.8% on time across 232 flights, within half a point 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. 233 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 SkyWest on AUS to SLC

Put together: treat all of this as provisional. 233 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 87.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 229 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