Best Time to Fly DEN to PHX: On-Time Stats by Hour & Airline
Denver International → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.0% of Denver (DEN) to Phoenix (PHX) flights arrived on time (8,973 scheduled flights). That is 1.6 points below the national average of 77.6%.
Among 5 airlines, United Airlines led with 81.5% on time and Southwest Airlines was last with 72.3%.
Over 24 months, Saturday was the most reliable day (80% on time) and July the worst month (64%).
The cancellation rate was 0.8% (US average 1.8%).
DEN to PHX 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 |
|---|---|---|---|---|
| United Airlines | 81.5% | 61 min | 0.3% | 2,362 |
| Frontier Airlines | 77.6% | 68 min | 0.6% | 1,469 |
| American Airlines | 75.7% | 120 min | 1.1% | 985 |
| Envoy Air | 75.3% | 104 min | 0.6% | 175 |
| Southwest Airlines | 72.3% | 56 min | 1.0% | 3,964 |
| SkyWest Airlines | Limited data | 18 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to PHX
On-time arrival % by scheduled departure hour (local time), 18,270 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 2 | |
| 5am–6am | 94.4% | 0.3% | 341 |
| 6am–7am | 92.7% | 1.2% | 810 |
| 7am–8am | 84.4% | 0.7% | 1,806 |
| 8am–9am | 83.2% | 0.9% | 1,067 |
| 9am–10am | 88.6% | 0.3% | 1,173 |
| 10am–11am | 83.1% | 1.8% | 628 |
| 11am–12pm | 83.4% | 0.8% | 1,453 |
| 12pm–1pm | 82.4% | 0.7% | 1,007 |
| 1pm–2pm | 81.1% | 0.8% | 1,025 |
| 2pm–3pm | 74.3% | 1.3% | 1,084 |
| 3pm–4pm | 73.3% | 1.0% | 796 |
| 4pm–5pm | 73.2% | 0.7% | 1,107 |
| 5pm–6pm | 65.3% | 0.7% | 925 |
| 6pm–7pm | 62.7% | 0.8% | 1,227 |
| 7pm–8pm | 70.3% | 0.4% | 1,367 |
| 8pm–9pm | 61.8% | 0.3% | 911 |
| 9pm–10pm | 62.3% | 1.0% | 790 |
| 10pm–11pm | 62.8% | 1.0% | 697 |
| 11pm–12am | 70.4% | 0.0% | 54 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to PHX
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) | 80.8% | +2.4 pts | 0.0% | 376 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.4% | -1.0 pts | 0.2% | 791 |
| Summer peak (Jun 15 - Aug 15) | 65.5% | -12.9 pts | 1.5% | 2,699 |
| All other days | 78.4% | — | 0.7% | 14,404 |
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).