Carrier route record
OOSJC→SLC
SkyWest Airlines · San Jose to Salt Lake City
- Flights
- 662
- Period
- September 2025 to August 2026
- Share of route
- 37%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on SJC to SLC earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 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 662 flights, with a median arrival 15 minutes early.
Set against the rest of the country, SkyWest's SJC to SLC record is 17 points better than the US average of 77.3%. That gap is worth roughly 168 fewer late arrivals for every thousand flights.
Key figures
On time
94.1%
Arrivals under 15 minutes late, of 661 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
0.15%
National rate is 1.89%
Whole route
91.9%
Every carrier on SJC to SLC, 1,794 flights
These figures cover 662 flights between September 2025 and August 2026. The median arrival is 15 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 SJC to SLC
SkyWest flew 662 of the 1,794 flights on SJC to SLC, about 37% of it. Its 94.1% on time is 2 points better than the route as a whole, which runs 91.9%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from SkyWest at 94.1% to Southwest at 78.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines (this page) | 662 | 94.1% | 86 min | 0.15% | A+ |
| Delta Air Lines | 924 | 93.2% | 86 min | 0.54% | A+ |
| Southwest Airlinesthin sample | 208 | 78.7% | 56 min | 0.48% | B+ |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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 662 flights.
- 5am–8am—
- 8am–11am313 flights96.2%
- 11am–2pm—
- 2pm–5pm100 flights95.0%
- 5pm–8pm249 flights91.2%
- 8pm–5am—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 96.2% on time for the 8am–11am window against 91.2% for 5pm–8pm. Worth taking if the schedule allows, not worth an extra connection. The 8am–11am window is the busiest, with 313 flights scheduled in it.
Across the year
SkyWest on SJC to SLC through the year
July is the worst month at 84.5% on time, 14 points below March, the best at 98.2%. 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. October was the busiest month here, with 85 flights.
Across the week, Tuesday is the strongest day at 98.0% on time and Wednesday the weakest at 90.5%, a spread of 8 points.
Arrival by arrival
How late SkyWest on SJC to SLC runs when it is late
SkyWest on SJC to SLC often beats the schedule: 331 of 661 completed flights, 50%, arrived 15 minutes or more early. The 39 late arrivals split 10 under half an hour, 11 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early331 flights50.1%
- Within 15 min291 flights44.0%
- 15–29 min late10 flights1.5%
- 30–59 min late11 flights1.7%
- 1–2 hours late6 flights0.9%
- 2+ hours late12 flights1.8%
Scale runs 0% to 100%.
Share of 661 completed flights by arrival against schedule.
5 of 41 late departures made up the time and arrived on time, 12% of them. Only 3 left on time and still arrived late.
The worst days
Worst days for SkyWest on SJC to SLC
The latest arrival of the period was on 22 June 2026, 5 hours 19 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 June 2026 | 5 hours 19 minutes | Carrier |
| 15 July 2026 | 3 hours 27 minutes | Carrier |
| 18 February 2026 | 3 hours 22 minutes | Carrier |
| 28 December 2025 | 3 hours 5 minutes | Carrier |
| 16 July 2026 | 2 hours 53 minutes | Carrier |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 87% of the 3,353 delay minutes carriers reported here, and the remaining four split what is left.
- 87%Carrier
- 11%Extreme weather
- 2%National Airspace System
Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 3,353 reported delay minutes.
The largest share of delay minutes, 87%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,906 of the 3,353 delay minutes reported here.
Cancellations are rare at 0.15%, 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.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 2.7% 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 584 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 92.0% on time across 664 flights, within 2 points 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. 662 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 SJC to SLC
Put together: treat all of this as provisional. 662 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 94.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 661 completed flights over 12 months sit behind that.
Related
Where to go next
- SJC to SLC, every carrier
- SkyWest on SLC to SJC, the return leg
- Delta Air Lines on SJC to SLC93.2%
- Southwest Airlines on SJC to SLC78.7%
- SkyWest Airlines network-wide record
- Norman Y. Mineta San Jose International (SJC) delay statistics
- Salt Lake City International (SLC) delay statistics
- Worst months to fly in the US, ranked by the data
- How to read this site: grades, sample sizes, and honest caveats
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.