Carrier route record

MQDEN→PHX

Envoy Air · Denver to Phoenix

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 DEN to PHX sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land close to two hours behind schedule. That rests on 189 flights. The strongest carrier on the route with a full sample, United Airlines, flew 2,369 at 80.5% on time.

United Airlines is the most reliable of the four carriers covered here at 80.5% on time across 2,369 flights.

On time

72.9%

Arrivals under 15 minutes late, of 188 completed flights

Avg delay

101 min

Across delayed arrivals only, not all flights

Cancelled

0.53%

National rate is 1.81%

Whole route

75.7%

Every carrier on DEN to PHX, 8,930 flights

These figures cover 189 flights between July 2025 and June 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

Envoy against every carrier on DEN to PHX

Envoy flew 189 of the 8,930 flights on DEN to PHX, about 2% of it. Its 72.9% on time is 3 points worse than the route as a whole, which runs 75.7%. Ranked by on-time rate it is number five of six carriers on the route, where the range runs from United at 80.5% to Southwest at 72.1%. 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 80.5% of the time; Southwest Airlines manages 72.1%. Sample sizes sit next to every figure, because a two-point gap across 3,950 flights means less than a ten-point one.

On-time performance by carrier on DEN to PHX
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines	2,369	80.5%	63 min	0.34%	B+
SkyWest Airlinesthin sample	18	77.8%	23 min	0.00%	B+
Frontier Airlines	1,432	77.4%	69 min	0.63%	B+
American Airlines	972	76.9%	120 min	0.82%	B+
Envoy Air (this page)thin sample	189	72.9%	101 min	0.53%	C+
Southwest Airlines	3,950	72.1%	56 min	1.14%	C

United leads Southwest by 8 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 12 points, against 8 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am11 flights—
11am–2pm37 flights81.1%
2pm–5pm8 flights—
5pm–8pm133 flights68.9%
8pm–5am—

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

The best window here is not the first bank but the 11am–2pm slot at 81.1% on time, ahead of 5pm–8pm at 68.9%. 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 5pm–8pm window is the busiest, with 133 flights scheduled in it.

Across the year

Envoy on DEN to PHX through the year

Jul–Sep 202524 flights—
Oct–Dec 202536 flights65.7%
Jan–Mar 202646 flights73.9%
Apr–Jun 202683 flights79.5%

Scale runs 55% to 85%. 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 72.9% on time across 189 flights.

Envoy on DEN to PHX did not run the same all year. Its best quarter was Apr–Jun 2026 at 79.5% on time and its weakest Oct–Dec 2025 at 65.7%, a swing of 14 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.

Across the week, Wednesday is the strongest day at 75.8% on time and Sunday the weakest at 60.0%. 16 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Envoy runs late on this route

One category carries most of the weight here. Carrier accounts for 57% of the 5,144 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
57%
Late-arriving aircraft
32%
National Airspace System
9%
Extreme weather
3%

The largest share of delay minutes, 57%, 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 2,922 of the 5,144 delay minutes reported here. The split is drawn from 5,144 reported delay minutes.

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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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 81.8% on time across 189 flights, 9 points above 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 DEN to PHX

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 72.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 188 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