Carrier performance at one airport
OO→SLC
SkyWest Airlines at Salt Lake City International
- Departures
- 36,165
- Period
- June 2025 to May 2026
- Routes
- 25
- Rank here
- #1 of 8
SkyWest Airlines at Salt Lake City earns a 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 77.4%. When something does go wrong the average delay runs about an hour. That rests on 36,165 flights, of which SkyWest Airlines flew 36,165 at 90.8% on time.
Measured against the airport rather than the country, SkyWest Airlines runs 6 points ahead of the 84.6% 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.
Key figures
On time
90.8%
35,905 completed departures
Avg delay
64 min
Across delayed flights only
Cancelled
0.43%
At SLC, this carrier only
Rank here
#1
Of 8 carriers clearing the floor at SLC
These figures cover 36,000 flights between June 2025 and May 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 90.8% of the time; Alaska Airlines manages 73.6%. Sample sizes sit next to every figure, because a two-point gap across 1,578 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines (this page) | 36,165 | 90.8% | 64 min | 0.43% | A+ |
| Delta Air Lines | 54,627 | 83.5% | 62 min | 0.75% | B+ |
| United Airlines | 4,851 | 80.0% | 72 min | 0.97% | B+ |
| Frontier Airlines | 3,432 | 79.1% | 88 min | 1.46% | B |
| Southwest Airlines | 11,356 | 78.3% | 51 min | 0.60% | B+ |
| American Airlines | 4,617 | 78.2% | 99 min | 2.43% | B |
| JetBlue Airways | 575 | 74.0% | 90 min | 3.48% | C− |
| Alaska Airlines | 1,578 | 73.6% | 48 min | 1.84% | C |
JetBlue Airways cancels 3.5% 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.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SLC to SGU · St. George | 1,708 | 92.3% | 69 min | 0.18% | A+ |
| SLC to DEN · Denver | 1,377 | 84.3% | 79 min | 0.65% | B+ |
| SLC to FAT · Fresno | 1,372 | 94.4% | 59 min | 0.51% | A+ |
| SLC to SFO · San Francisco | 1,164 | 71.0% | 73 min | 1.20% | C |
| SLC to ABQ · Albuquerque | 1,153 | 92.6% | 51 min | 0.00% | A+ |
| SLC to PHX · Phoenix | 1,116 | 87.3% | 105 min | 0.27% | A+ |
| SLC to TUS · Tucson | 1,087 | 90.7% | 44 min | 0.18% | A+ |
| SLC to SUN · Hailey | 1,078 | 94.2% | 52 min | 0.74% | A+ |
| SLC to GTF · Great Falls | 1,071 | 93.2% | 53 min | 0.75% | A+ |
| SLC to OAK · Oakland | 1,068 | 92.1% | 54 min | 0.19% | A+ |
| SLC to PSP · Palm Springs | 1,007 | 91.7% | 46 min | 0.40% | A+ |
| SLC to BUR · Burbank | 960 | 88.4% | 48 min | 0.52% | A+ |
| SLC to SBA · Santa Barbara | 896 | 94.5% | 47 min | 0.78% | A+ |
| SLC to IDA · Idaho Falls | 862 | 93.3% | 77 min | 0.12% | A+ |
| SLC to PSC · Pasco | 835 | 90.6% | 60 min | 0.12% | A+ |
| SLC to TWF · Twin Falls | 785 | 93.3% | 85 min | 0.51% | A+ |
| SLC to FCA · Kalispell | 774 | 92.8% | 44 min | 0.78% | A+ |
| SLC to GEG · Spokane | 730 | 92.8% | 56 min | 0.14% | A+ |
| SLC to EUG · Eugene | 730 | 93.8% | 66 min | 0.00% | A+ |
| SLC to RDM · Redmond | 729 | 93.5% | 81 min | 0.41% | A+ |
| SLC to MFR · Medford | 729 | 91.3% | 76 min | 0.14% | A+ |
| SLC to HLN · Helena | 725 | 96.8% | 36 min | 0.28% | A+ |
| SLC to OKC · Oklahoma City | 720 | 89.1% | 50 min | 0.56% | A+ |
| SLC to OMA · Omaha | 718 | 90.3% | 56 min | 0.14% | A+ |
| SLC to BIL · Billings | 708 | 92.2% | 65 min | 0.56% | A+ |
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–8am1,896 flights91.8%
- 8am–11am8,884 flights91.5%
- 11am–2pm6,019 flights90.4%
- 2pm–5pm8,047 flights90.3%
- 5pm–8pm2,983 flights88.9%
- 8pm–5am8,336 flights91.2%
Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.
The overnight block holds up unusually well at 91.2% on time across 8,336 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.
Across the year
Seasonal pattern
February is the weak month at 87.4% on time, against 94.4% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days.
Delay causes
What holds this operation up
- 65%Carrier
- 14%National Airspace System
- 13%Extreme weather
- 8%Late-arriving aircraft
- 0%Security
Extreme weather accounts for 13% 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 2.1 times the usual weather exposure.
Cancellations are rare at 0.43%, below the national 1.80% 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 2.8% land an hour or more behind schedule, against 8.2% 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.
36,165 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: the carrier matters more than the hour here. SkyWest Airlines at 90.8% against Alaska Airlines at 73.6% is 17 points of difference, while the spread across departure windows is only 3 points. Choose the operator, then the time.
Common questions
SkyWest Airlines at SLC
How often is SkyWest Airlines at SLC delayed?
Roughly one flight in ten arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 9.2% of the 36,165 flights in this analysis, against 22.6% 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 90.8% on time across 36,165 flights. Alaska Airlines is at the other end on 73.6%, a gap of 17 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 91.8% on time. The 5pm–8pm window is the weakest at 88.9%, 3 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 February delays on SkyWest Airlines at SLC?
February is the weakest month at 87.4% on time, compared with 94.4% in September. Across the year that is 7 points between the best and worst months. The seasonal swing is modest enough that it should not decide when you travel.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.