Carrier route record

OOSLC→SJC

SkyWest Airlines · Salt Lake City to San Jose

Flights: 694
Period: July 2025 to June 2026
Share of route: 38%
Carriers: 3

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

SkyWest on SLC to SJC 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 694 flights, with a median arrival 11 minutes early.

Set against the rest of the country, SkyWest's SLC to SJC record is 15 points better than the US average of 77.6%. That gap is worth roughly 153 fewer late arrivals for every thousand flights.

On time

92.9%

Arrivals under 15 minutes late, of 693 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

0.14%

National rate is 1.81%

Whole route

87.0%

Every carrier on SLC to SJC, 1,810 flights

These figures cover 694 flights between July 2025 and June 2026. The median arrival is 11 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.

Carrier by carrier

SkyWest against every carrier on SLC to SJC

SkyWest flew 694 of the 1,810 flights on SLC to SJC, about 38% of it. Its 92.9% on time is 6 points better than the route as a whole, which runs 87.0%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from SkyWest at 92.9% to Southwest at 77.9%. 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.

On-time performance by carrier on SLC to SJC
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	694	92.9%	61 min	0.14%	A+
Delta Air Lines	892	84.6%	73 min	0.45%	B+
Southwest Airlinesthin sample	224	77.9%	48 min	0.89%	B+

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 11 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am107 flights93.5%
8am–11am208 flights97.6%
11am–2pm—
2pm–5pm231 flights92.6%
5pm–8pm148 flights86.5%
8pm–5am—

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 97.6% of the time, against 86.5% for the evening window. That is 11 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 231 flights scheduled in it.

Across the year

SkyWest on SLC to SJC through the year

Darker means more delays. Figures are on-time percentages.December best, May worst

Delays peak in May, when the on-time rate falls to 86.3%. December is the strongest month at 96.7%. Moving a flexible trip across that boundary buys 10 points. October was the busiest month here, with 85 flights.

Across the week, Tuesday is the strongest day at 98.1% on time and Sunday the weakest at 89.7%. 8 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

One category carries most of the weight here. Carrier accounts for 76% of the 3,010 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
76%
Extreme weather
19%
National Airspace System
5%

Extreme weather accounts for 19% 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 3.0 times the usual weather exposure. The split is drawn from 3,010 reported delay minutes.

The largest share of delay minutes, 76%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,292 of the 3,010 delay minutes reported here.

Cancellations are rare at 0.14%, below the national 1.81% 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 2.9% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg runs 94.9% on time across 692 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. 694 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 SLC to SJC

Put together: treat all of this as provisional. 694 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 92.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 693 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures