Best Time to Fly PHX to DEN: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → Denver International
Data through July 2026 · Last updated October 18, 2026
8,944 flights were scheduled from Phoenix (PHX) to Denver (DEN) in the last 12 months, and 77.3% of those that flew arrived on time, in line with the US average of 77.6%.
Envoy Air was the most punctual of the 5 airlines on the route at 83.9%, while Southwest Airlines trailed at 72.7%.
February has been the best month (85% on time) and Sunday the weakest day of the week (77%).
0.7% of flights were cancelled, versus 1.8% nationally.
PHX to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Air | 83.9% | 42 min | 0.6% | 175 |
| United Airlines | 83.9% | 75 min | 0.6% | 2,363 |
| Frontier Airlines | 79.6% | 88 min | 0.7% | 1,464 |
| American Airlines | 75.4% | 73 min | 0.8% | 987 |
| Southwest Airlines | 72.7% | 55 min | 0.6% | 3,937 |
| SkyWest Airlines | Limited data | 18 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to DEN
On-time arrival % by scheduled departure hour (local time), 18,318 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 1 | |
| 5am–6am | 96.0% | 0.9% | 680 |
| 6am–7am | 92.4% | 0.3% | 1,381 |
| 7am–8am | 89.2% | 0.3% | 1,192 |
| 8am–9am | 86.2% | 0.4% | 1,318 |
| 9am–10am | 84.8% | 0.7% | 1,533 |
| 10am–11am | 84.7% | 1.3% | 775 |
| 11am–12pm | 82.1% | 1.1% | 806 |
| 12pm–1pm | 83.9% | 1.4% | 1,109 |
| 1pm–2pm | 73.5% | 0.8% | 1,314 |
| 2pm–3pm | 68.6% | 0.8% | 924 |
| 3pm–4pm | 63.5% | 0.7% | 1,217 |
| 4pm–5pm | 68.6% | 1.0% | 1,636 |
| 5pm–6pm | 72.0% | 0.6% | 709 |
| 6pm–7pm | 67.5% | 0.8% | 1,201 |
| 7pm–8pm | 78.3% | 0.6% | 1,051 |
| 8pm–9pm | 70.2% | 0.3% | 682 |
| 9pm–10pm | 70.0% | 0.8% | 521 |
| 10pm–11pm | 78.5% | 0.8% | 262 |
| 11pm–12am | Limited data | 6 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHX to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 82.7% | +2.7 pts | 0.0% | 375 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.9% | +3.0 pts | 0.2% | 787 |
| Summer peak (Jun 15 - Aug 15) | 68.4% | -11.5 pts | 1.4% | 2,676 |
| All other days | 79.9% | — | 0.7% | 14,480 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).