Carrier route record

MQPHX→DEN

Envoy Air · Phoenix to Denver

Flights: 189
Period: July 2025 to June 2026
Share of route: 2%
Carriers: 6

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

Envoy on PHX to DEN lands a B+, 4 points better than the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That is a workable record, not a spotless one. That rests on 189 flights. The strongest carrier on the route with a full sample, United Airlines, flew 2,370 at 83.5% on time.

United Airlines is the most reliable of the four carriers covered here at 83.5% on time across 2,370 flights.

On time

81.8%

Arrivals under 15 minutes late, of 187 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

0.53%

National rate is 1.81%

Whole route

77.2%

Every carrier on PHX to DEN, 8,920 flights

These figures cover 189 flights between July 2025 and June 2026. The median arrival is 8 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 DEN

Envoy flew 189 of the 8,920 flights on PHX to DEN, about 2% of it. Its 81.8% on time is 5 points better than the route as a whole, which runs 77.2%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from United at 83.5% to SkyWest at 66.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. United Airlines arrives on time 83.5% of the time; Southwest Airlines manages 72.8%. Sample sizes sit next to every figure, because a two-point gap across 3,942 flights means less than a ten-point one.

On-time performance by carrier on PHX to DEN
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines	2,370	83.5%	75 min	0.59%	B+
Envoy Air (this page)thin sample	189	81.8%	53 min	0.53%	B+
Frontier Airlines	1,427	80.0%	88 min	0.63%	B+
American Airlines	974	74.8%	66 min	0.62%	C+
Southwest Airlines	3,942	72.8%	56 min	0.81%	C+
SkyWest Airlinesthin sample	18	66.7%	98 min	0.00%	C+

United leads Southwest by 11 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Departure window

When Envoy 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 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am45 flights93.3%
11am–2pm—
2pm–5pm135 flights76.7%
5pm–8pm9 flights—
8pm–5am—

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

Book the morning departure. Flights leaving between 8am–11am arrive on time 93.3% of the time, against 76.7% for the afternoon window. That is 17 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 135 flights scheduled in it.

Across the year

Envoy on PHX to DEN through the year

Jul–Sep 202525 flights—
Oct–Dec 202535 flights70.6%
Jan–Mar 202646 flights80.4%
Apr–Jun 202683 flights90.4%

Scale runs 60% 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 81.8% on time across 189 flights.

Envoy on PHX to DEN did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.4% on time and its weakest Oct–Dec 2025 at 70.6%, a swing of 20 points on roughly 63 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.

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 1,784 reported delay minutes.

National Airspace System
41%
Late-arriving aircraft
25%
Carrier
21%
Extreme weather
12%

Extreme weather accounts for 12% 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 2.0 times the usual weather exposure. The split is drawn from 1,784 reported delay minutes.

41% 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 733 minutes out of 1,784, against a national NAS share of 21%.

Cancellations are rare at 0.53%, 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

6.4% 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 roughly 55 minutes, which a normal layover absorbs.

The 602 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 72.9% on time across 189 flights, 9 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 9 points of difference.

One caution: this is a thin sample. 189 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 DEN

Put together: treat all of this as provisional. 189 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 81.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 187 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