Carrier route record

OOAUS→SLC

SkyWest Airlines · Austin to Salt Lake City

Flights: 244
Period: September 2025 to August 2026
Share of route: 14%
Carriers: 3

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

SkyWest on AUS to SLC earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 244 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,072 at 86.0% on time.

Set against the rest of the country, SkyWest's AUS to SLC record is 9 points better than the US average of 77.3%. That gap is worth roughly 85 fewer late arrivals for every thousand flights.

On time

85.8%

Arrivals under 15 minutes late, of 240 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

1.23%

National rate is 1.89%

Whole route

81.1%

Every carrier on AUS to SLC, 1,798 flights

These figures cover 244 flights between September 2025 and August 2026. The median arrival is 7 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.

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Carrier by carrier

SkyWest against every carrier on AUS to SLC

SkyWest flew 244 of the 1,798 flights on AUS to SLC, about 14% of it. Its 85.8% on time is 5 points better than the route as a whole, which runs 81.1%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 86.0% to Southwest at 68.0%.

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 86.0% of the time; Southwest Airlines manages 68.0%. Sample sizes sit next to every figure, because a two-point gap across 482 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
Delta Air Lines	1,072	86.0%	94 min	0.84%	A+
SkyWest Airlines (this page)thin sample	244	85.8%	82 min	1.23%	A
Southwest Airlines	482	68.0%	58 min	0.21%	C+

The spread between Delta and Southwest is 18 points, wide enough that it should decide the booking. On a hundred trips that is 18 more arrivals inside the on-time window.

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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 244 flights.

5am–8am115 flights88.4%
8am–11am—
11am–2pm—
2pm–5pm129 flights83.6%
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: 88.4% on time for the 5am–8am window against 83.6% for 2pm–5pm. Worth taking if the schedule allows, not worth an extra connection. The 2pm–5pm window is the busiest, with 129 flights scheduled in it.

Across the year

SkyWest on AUS to SLC through the year

Jul–Sep 202515 flights—
Oct–Dec 202543 flights93.0%
Jan–Mar 202647 flights88.6%
Apr–Jun 202689 flights83.0%
Jul–Sep 202650 flights84.0%

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 85.8% on time across 244 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 61 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 95.7% on time and Thursday the weakest at 75.6%, a spread of 20 points.

Arrival by arrival

How late SkyWest on AUS to SLC runs when it is late

SkyWest on AUS to SLC often beats the schedule: 66 of 240 completed flights, 28%, arrived 15 minutes or more early. The 34 late arrivals split 11 under half an hour, 10 between 30 and 60 minutes, and 13 an hour or more.

15+ min early66 flights27.5%
Within 15 min140 flights58.3%
15–29 min late11 flights4.6%
30–59 min late10 flights4.2%
1–2 hours late7 flights2.9%
2+ hours late6 flights2.5%

Scale runs 0% to 100%.

Share of 240 completed flights by arrival against schedule.

7 of 31 late departures made up the time and arrived on time, 23% of them. 10 flights left on time and still arrived late.

The worst days

Worst days for SkyWest on AUS to SLC

The latest arrival of the period was on 6 April 2026, 9 hours 21 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of SkyWest on AUS to SLC in the period
Date	Arrived late by	Largest filed cause
6 April 2026	9 hours 21 minutes	Carrier
23 August 2026	6 hours 1 minute	Carrier
4 June 2026	3 hours 15 minutes	Carrier
3 May 2026	2 hours 45 minutes	National Airspace System
17 June 2026	2 hours 32 minutes	Carrier

Delay causes

Why SkyWest runs late on this route

Carrier accounts for 83% of the 2,788 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
83%
National Airspace System
14%
Extreme weather
3%

The largest share of delay minutes, 83%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,306 of the 2,788 delay minutes reported here. The split is drawn from 2,788 reported delay minutes.

Cancellations sit at 1.23% against a national 1.89%, which is ordinary. Diversions add another 0.41%.

Connections and stage length

What a delay here costs

5.4% 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 an hour and a half, which a normal layover absorbs.

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.

The return leg runs 84.5% on time across 242 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.

One caution: this is a thin sample. 244 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. 244 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 85.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 240 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures