Carrier route record
OOLAX→SLC
SkyWest Airlines · Los Angeles to Salt Lake City
- Flights
- 720
- Period
- September 2025 to August 2026
- Share of route
- 17%
- Carriers
- 6
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on LAX 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 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 720 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 2,457 at 88.4% on time.
Delta Air Lines is the most reliable of the three carriers covered here at 88.4% on time across 2,457 flights.
Key figures
On time
88.0%
Arrivals under 15 minutes late, of 719 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
87.2%
Every carrier on LAX to SLC, 4,195 flights
These figures cover 720 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.
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Carrier by carrier
SkyWest against every carrier on LAX to SLC
SkyWest flew 720 of the 4,195 flights on LAX to SLC, about 17% of it. Its 88.0% on time is about level with the route as a whole at 87.2%. Ranked by on-time rate it is number four of six carriers on the route, where the range runs from Spirit at 90.9% to Southwest at 79.7%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 88.4% of the time; Southwest Airlines manages 79.7%. Sample sizes sit next to every figure, because a two-point gap across 371 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 23 | 90.9% | 29 min | 4.35% | A− |
| United Airlinesthin sample | 149 | 88.6% | 65 min | 0.00% | A+ |
| Delta Air Lines | 2,457 | 88.4% | 80 min | 0.53% | A+ |
| SkyWest Airlines (this page) | 720 | 88.0% | 69 min | 0.00% | A+ |
| Frontier Airlines | 475 | 85.3% | 75 min | 1.26% | A |
| Southwest Airlines | 371 | 79.7% | 47 min | 0.27% | B+ |
Delta leads Southwest by 9 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
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Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 points, against 9 points between the best and worst carrier.
- 5am–8am—
- 8am–11am197 flights86.3%
- 11am–2pm233 flights91.4%
- 2pm–5pm80 flights85.0%
- 5pm–8pm147 flights93.2%
- 8pm–5am63 flights73.0%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 93.2% on time. The full set of windows spans 20 points.
Across the year
SkyWest on LAX to SLC through the year
August is the worst month at 70.7% on time, 26 points below October, the best at 96.7%. 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. March was the busiest month here, with 91 flights.
Across the week, Tuesday is the strongest day at 93.0% on time and Sunday the weakest at 80.6%, a spread of 12 points.
Arrival by arrival
How late SkyWest on LAX to SLC runs when it is late
SkyWest on LAX to SLC often beats the schedule: 218 of 719 completed flights, 30%, arrived 15 minutes or more early. The 86 late arrivals split 28 under half an hour, 26 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early218 flights30.3%
- Within 15 min415 flights57.7%
- 15–29 min late28 flights3.9%
- 30–59 min late26 flights3.6%
- 1–2 hours late20 flights2.8%
- 2+ hours late12 flights1.7%
Scale runs 0% to 100%.
Share of 719 completed flights by arrival against schedule.
12 of 81 late departures made up the time and arrived on time, 15% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for SkyWest on LAX to SLC
The latest arrival of the period was on 18 January 2026, 5 hours 25 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in January 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 January 2026 | 5 hours 25 minutes | Carrier |
| 1 January 2026 | 5 hours 4 minutes | Carrier |
| 21 January 2026 | 4 hours 51 minutes | Carrier |
| 1 February 2026 | 4 hours 25 minutes | Carrier |
| 11 September 2025 | 4 hours 19 minutes | Late-arriving aircraft |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 42% of the 5,907 delay minutes carriers reported here, and the remaining four split what is left.
- 42%Carrier
- 41%Late-arriving aircraft
- 9%Extreme weather
- 8%National Airspace System
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,907 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 5,907 reported delay minutes.
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,510 of the 5,907 delay minutes reported here.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 4.5% 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.
The 590 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 is a different operation and performs like one: it runs 91.1% on time across 720 flights, 3 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
One caution: this is a thin sample. 720 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 LAX to SLC
Put together: treat all of this as provisional. 720 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 88.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 719 completed flights over 12 months sit behind that.
Related
Where to go next
- LAX to SLC, every carrier
- SkyWest on SLC to LAX, the return leg
- United Airlines on LAX to SLC88.6%
- Delta Air Lines on LAX to SLC88.4%
- Frontier Airlines on LAX to SLC85.3%
- Southwest Airlines on LAX to SLC79.7%
- SkyWest Airlines network-wide record
- Los Angeles International (LAX) delay statistics
- Salt Lake City International (SLC) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.