Carrier route record

OOPHX→SJC

SkyWest Airlines · Phoenix to San Jose

Flights: 293
Period: July 2025 to June 2026
Share of route: 10%
Carriers: 4

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

SkyWest on PHX to SJC earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 293 flights. The strongest carrier on the route with a full sample, Southwest Airlines, flew 1,866 at 77.7% on time.

Set against the rest of the country, SkyWest's PHX to SJC record is 9 points better than the US average of 77.6%. That gap is worth roughly 86 fewer late arrivals for every thousand flights.

On time

86.2%

Arrivals under 15 minutes late, of 290 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

0.68%

National rate is 1.81%

Whole route

79.0%

Every carrier on PHX to SJC, 3,016 flights

These figures cover 293 flights between July 2025 and June 2026. The median arrival is 12 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 PHX to SJC

SkyWest flew 293 of the 3,016 flights on PHX to SJC, about 10% of it. Its 86.2% on time is 7 points better than the route as a whole, which runs 79.0%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Envoy at 87.2% to American at 76.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The two carriers here are closely matched: about a point separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on PHX to SJC
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Airthin sample	220	87.2%	43 min	0.45%	A+
SkyWest Airlines (this page)thin sample	293	86.2%	74 min	0.68%	A+
Southwest Airlines	1,866	77.7%	48 min	0.38%	B+
American Airlines	637	76.5%	84 min	0.78%	B+

No carrier stands out. Southwest tops the table at 77.7%, about a point clear of the bottom, which is inside the range this kind of sample moves year to year.

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

5am–8am49 flights95.8%
8am–11am39 flights79.5%
11am–2pm102 flights85.0%
2pm–5pm66 flights84.8%
5pm–8pm37 flights86.5%
8pm–5am—

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 95.8% of the time, against 79.5% for the morning window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 102 flights scheduled in it.

Across the year

SkyWest on PHX to SJC through the year

Jul–Sep 202526 flights—
Oct–Dec 202552 flights86.3%
Jan–Mar 2026154 flights81.7%
Apr–Jun 202661 flights91.7%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 86.2% on time across 293 flights.

SkyWest on PHX to SJC did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.7% on time and its weakest Jan–Mar 2026 at 81.7%, a swing of 10 points on roughly 98 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Thursday is the strongest day at 93.9% on time and Friday the weakest at 81.2%. 13 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. Late-arriving aircraft accounts for 46% of the 2,956 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.

Late-arriving aircraft
46%
Carrier
46%
National Airspace System
5%
Extreme weather
4%

46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,956 reported delay minutes here, that single category outweighs weather by 12 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,956 reported delay minutes.

The largest share of delay minutes, 46%, 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 1,346 of the 2,956 delay minutes reported here.

Cancellations are rare at 0.68%, 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

6.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 621 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 85.5% on time across 293 flights, within half a point 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. 293 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 PHX to SJC

Put together: treat all of this as provisional. 293 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 86.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 290 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