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Route Reliability

Phoenix → Denver

PHX–DEN · 602 miles · Phoenix Sky Harbor International Airport to Denver International Airport

81
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
10 min
Average arrival delay
0.8%
Cancelled
8,893
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines83%2,380 flights
  2. 2.Frontier Airlines80%1,394 flights
  3. 3.American Airlines76%1,181 flights
  4. 4.Southwest Airlines74%3,938 flights

What the data says

Morning flights do better here.

PHX–DEN flights departing between 3–6 AM arrived on time 96% of the time, versus 66% between 3–6 PM.

Sunday scaries are real for this one.

PHX–DEN flights arrived on time 82% of the time on Saturdays. On Sundays: 74%.

United Airlines runs this route best.

United Airlines arrived on time 83% of the time on this route; Southwest Airlines managed 74%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon78%(1335 flights)
  • Tue79%(1151 flights)
  • Wed78%(1200 flights)
  • Thu77%(1334 flights)
  • Fri77%(1322 flights)
  • Sat82%(1090 flights)
  • Sun74%(1359 flights)
On-time by departure window
  • 3–6 AM96%(235 flights)
  • 6–9 AM89%(1929 flights)
  • 9 AM–12 PM84%(1569 flights)
  • 12–3 PM75%(1631 flights)
  • 3–6 PM66%(1696 flights)
  • 6–9 PM71%(1367 flights)
  • 9 PM–12 AM70%(364 flights)
On-time trend by month
77%
May

Jun 65% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%632
July 202565%640
August 202573%604
September 202579%656
October 202581%801
November 202580%750
December 202579%760
January 202684%724
February 202683%720
March 202675%916
April 202686%826
May 202677%762

Keep nerding

Based on 8,893 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.