Carrier route record

OOSJC→PHX

SkyWest Airlines · San Jose to Phoenix

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 SJC to PHX 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 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 293 flights. The strongest carrier on the route with a full sample, American Airlines, flew 639 at 87.5% on time.

Set against the rest of the country, SkyWest's SJC to PHX record is 8 points better than the US average of 77.6%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.

On time

85.5%

Arrivals under 15 minutes late, of 290 completed flights

Avg delay

97 min

Across delayed arrivals only, not all flights

Cancelled

1.02%

National rate is 1.81%

Whole route

82.0%

Every carrier on SJC to PHX, 3,031 flights

These figures cover 293 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 SJC to PHX

SkyWest flew 293 of the 3,031 flights on SJC to PHX, about 10% of it. Its 85.5% on time is 4 points better than the route as a whole, which runs 82.0%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from Envoy at 89.9% to Southwest at 78.6%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. American Airlines arrives on time 87.5% of the time; Southwest Airlines manages 78.6%. Sample sizes sit next to every figure, because a two-point gap across 1,879 flights means less than a ten-point one.

On-time performance by carrier on SJC to PHX
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Airthin sample	220	89.9%	50 min	0.91%	A+
American Airlines	639	87.5%	102 min	0.78%	A+
SkyWest Airlines (this page)thin sample	293	85.5%	97 min	1.02%	A
Southwest Airlines	1,879	78.6%	48 min	0.64%	B+

American leads Southwest by 9 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

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 17 points, against 9 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am57 flights84.2%
11am–2pm72 flights79.2%
2pm–5pm85 flights81.9%
5pm–8pm79 flights96.2%
8pm–5am—

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

The weak window here is the middle of the day, not the evening: 11am–2pm runs 79.2% on time against 96.2% for 5pm–8pm. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 2pm–5pm window is the busiest, with 85 flights scheduled in it.

Across the year

SkyWest on SJC to PHX through the year

Jul–Sep 202526 flights—
Oct–Dec 202552 flights73.1%
Jan–Mar 2026154 flights84.2%
Apr–Jun 202661 flights93.3%

Scale runs 65% to 100%. 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 85.5% on time across 293 flights.

SkyWest on SJC to PHX did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.3% on time and its weakest Oct–Dec 2025 at 73.1%, a swing of 20 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 Saturday the weakest at 81.1%. 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 44% of the 4,051 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
44%
Carrier
43%
Extreme weather
9%
National Airspace System
4%

44% 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 4,051 reported delay minutes here, that single category outweighs weather by 5 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 4,051 reported delay minutes.

The largest share of delay minutes, 43%, 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 1,749 of the 4,051 delay minutes reported here.

Cancellations sit at 1.02% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and stage length

What a delay here costs

6.9% 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 an hour and a half, 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 86.2% 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 SJC to PHX

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 85.5% 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