Carrier route record

MQPHX→SBP

Envoy Air · Phoenix to San Luis Obispo

Flights: 281
Period: July 2025 to June 2026
Share of route: 23%
Carriers: 3

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

Envoy on PHX to SBP earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 40 minutes. That rests on 281 flights. The strongest carrier on the route with a full sample, American Airlines, flew 533 at 81.4% on time.

Set against the rest of the country, Envoy's PHX to SBP record is 16 points better than the US average of 77.6%. That gap is worth roughly 155 fewer late arrivals for every thousand flights.

On time

93.1%

Arrivals under 15 minutes late, of 276 completed flights

Avg delay

41 min

Across delayed arrivals only, not all flights

Cancelled

1.07%

National rate is 1.81%

Whole route

83.1%

Every carrier on PHX to SBP, 1,231 flights

These figures cover 281 flights between July 2025 and June 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.

Carrier by carrier

Envoy against every carrier on PHX to SBP

Envoy flew 281 of the 1,231 flights on PHX to SBP, about 23% of it. Its 93.1% on time is 10 points better than the route as a whole, which runs 83.1%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Envoy at 93.1% to SkyWest at 78.5%.

The two carriers here are closely matched: 3 points 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 SBP
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Air (this page)thin sample	281	93.1%	41 min	1.07%	A
American Airlines	533	81.4%	81 min	0.56%	B+
SkyWest Airlines	417	78.5%	63 min	0.96%	B+

No carrier stands out. American tops the table at 81.4%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.

Departure window

When Envoy 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 281 flights.

5am–8am—
8am–11am96 flights92.5%
11am–2pm52 flights96.2%
2pm–5pm57 flights89.5%
5pm–8pm58 flights94.7%
8pm–5am18 flights—

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

The best window here is not the first bank but the 11am–2pm slot at 96.2% on time, ahead of 2pm–5pm at 89.5%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8am–11am window is the busiest, with 96 flights scheduled in it.

Across the year

Envoy on PHX to SBP through the year

Oct–Dec 2025124 flights92.4%
Jan–Mar 2026143 flights93.7%
Apr–Jun 202614 flights—

Scale runs 85% 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 93.1% on time across 281 flights.

Split by quarter, Envoy on PHX to SBP logged 124 flights in Oct–Dec 2025, 143 flights in Jan–Mar 2026 and 14 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 93.1% annual figure is the one to use.

Across the week, Tuesday is the strongest day at 97.8% on time and Wednesday the weakest at 85.4%. 12 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Envoy runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 777 reported delay minutes.

National Airspace System
36%
Carrier
35%
Late-arriving aircraft
29%

36% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 283 minutes out of 777, against a national NAS share of 21%. The split is drawn from 777 reported delay minutes.

The largest share of delay minutes, 35%, 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 271 of the 777 delay minutes reported here.

Cancellations sit at 1.07% against a national 1.81%, which is ordinary. Diversions add another 0.71%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 1.8% 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 509 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 is a different operation and performs like one: it runs 89.6% on time across 281 flights, 4 points below 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 4 points of difference.

One caution: this is a thin sample. 281 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 Envoy on PHX to SBP

Put together: treat all of this as provisional. 281 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 93.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 276 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