Carrier performance at one airport

OO→SLC

SkyWest Airlines at Salt Lake City International

Departures: 36,308
Period: September 2025 to August 2026
Routes: 25
Rank here: #1 of 8

SkyWest Airlines at Salt Lake City 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 36,308 flights, of which SkyWest Airlines flew 36,308 at 89.9% on time.

Measured against the airport rather than the country, SkyWest Airlines runs 6 points ahead of the 84.2% weighted average across all carriers at SLC. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.

On time

89.9%

36,057 completed departures

Avg delay

68 min

Across delayed flights only

Cancelled

0.41%

At SLC, this carrier only

Rank here

Of 8 carriers clearing the floor at SLC

These figures cover 36,000 flights between September 2025 and August 2026. The median arrival is 10 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.

Against the competition

Every carrier at SLC, ranked

The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 89.9% of the time; JetBlue Airways manages 71.9%. Sample sizes sit next to every figure, because a two-point gap across 584 flights means less than a ten-point one.

On-time performance of all carriers departing SLC
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	36,308	89.9%	68 min	0.41%	A+
Delta Air Lines	54,749	83.2%	60 min	0.80%	B+
Frontier Airlines	3,572	80.3%	86 min	1.40%	B
United Airlines	4,850	80.3%	79 min	1.09%	B
American Airlines	4,660	79.5%	108 min	2.17%	B
Southwest Airlines	11,193	77.6%	49 min	0.54%	B+
Alaska Airlines	1,733	76.1%	50 min	1.33%	B
JetBlue Airways	584	71.9%	83 min	5.31%	C−

JetBlue Airways cancels 5.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Route by route

Where SkyWest Airlines flies from SLC

SkyWest Airlines operates 25 routes out of SLC with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.

SkyWest Airlines routes from SLC
Route	Flights	On time	Avg delay	Cancelled	Grade
SLC to SGU · St. George	1,727	91.4%	81 min	0.17%	A+
SLC to DEN · Denver	1,378	85.7%	65 min	0.58%	A+
SLC to FAT · Fresno	1,365	93.1%	60 min	0.51%	A+
SLC to PHX · Phoenix	1,222	85.3%	119 min	0.25%	A+
SLC to ABQ · Albuquerque	1,149	91.5%	56 min	0.00%	A+
SLC to TUS · Tucson	1,087	91.4%	50 min	0.18%	A+
SLC to SUN · Hailey	1,078	93.5%	52 min	0.74%	A+
SLC to OAK · Oakland	1,074	91.8%	54 min	0.19%	A+
SLC to GTF · Great Falls	1,072	93.4%	52 min	0.75%	A+
SLC to SFO · San Francisco	1,011	63.9%	75 min	1.19%	D
SLC to PSP · Palm Springs	1,009	92.4%	54 min	0.40%	A+
SLC to BUR · Burbank	939	90.9%	60 min	0.53%	A+
SLC to SBA · Santa Barbara	934	92.9%	53 min	0.43%	A+
SLC to IDA · Idaho Falls	878	92.5%	70 min	0.11%	A+
SLC to TWF · Twin Falls	859	92.4%	85 min	0.47%	A+
SLC to PSC · Pasco	829	90.6%	60 min	0.12%	A+
SLC to SAN · San Diego	815	82.2%	57 min	0.86%	B+
SLC to EUG · Eugene	800	90.9%	54 min	0.00%	A+
SLC to OMA · Omaha	780	89.2%	58 min	0.13%	A+
SLC to RDM · Redmond	729	93.2%	100 min	0.41%	A+
SLC to MFR · Medford	729	90.2%	75 min	0.14%	A+
SLC to HLN · Helena	725	95.2%	38 min	0.28%	A+
SLC to COS · Colorado Springs	721	91.9%	50 min	0.14%	A+
SLC to LAX · Los Angeles	720	91.1%	77 min	0.00%	A+
SLC to OKC · Oklahoma City	720	89.5%	58 min	0.56%	A+

Flight by flight

SkyWest Airlines flight numbers from SLC

47 SkyWest Airlines flight numbers leaving SLC flew their main route often enough to have a record of their own. Grouped by destination.

Departure window

Best time of day for this operation

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 36,000 flights.

5am–8am2,029 flights91.5%
8am–11am9,068 flights90.4%
11am–2pm5,942 flights90.0%
2pm–5pm8,020 flights89.3%
5pm–8pm3,403 flights85.5%
8pm–5am7,846 flights91.4%

Scale runs 75% to 95%.

The overnight block holds up unusually well at 91.4% on time across 7,846 flights. Red-eyes fly into empty airspace and empty gates, and they are the first rotation of the aircraft's day rather than the last. The 8am–11am window is the busiest, with 9,068 flights scheduled in it.

Across the year

Seasonal pattern

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

August is the worst month at 86.6% on time, 8 points below September, the best at 94.4%. 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. May was the busiest month here, with 3,286 flights.

Delay causes

What holds this operation up

Carrier
63%
Extreme weather
15%
National Airspace System
14%
Late-arriving aircraft
8%
Security
0%

Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 245,899 reported delay minutes.

Cancellations are rare at 0.41%, 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.

Badly late arrivals are rare here: only 3.3% land an hour or more behind schedule, against 8.3% 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.

36,308 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.

Put together: take the 5am–8am departure, avoid August if the dates are flexible, and if two carriers are within a few dollars of each other, SkyWest is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 18 points, which is the most any booking decision can do. 36,057 completed flights over 12 months sit behind that.

Common questions

SkyWest Airlines at SLC

How often is SkyWest Airlines at SLC delayed?

About one flight in ten arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 10.1% of the 36,308 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.

Which airline is most reliable on SkyWest Airlines at SLC?

SkyWest Airlines leads at 89.9% on time across 36,308 flights. JetBlue Airways is at the other end on 71.9%, a gap of 18 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 SkyWest Airlines at SLC?

The 5am–8am departure window is the strongest at 91.5% on time. The 5pm–8pm window is the weakest at 85.5%, 6 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 August delays on SkyWest Airlines at SLC?

August is the weakest month at 86.6% on time, compared with 94.4% in September. Across the year that is 8 points between the best and worst months. The seasonal swing is modest enough that it should not decide when you travel.

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