Best Time to Fly TUS to DEN: On-Time Stats by Hour & Airline
Tucson International → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.4% of Tucson (TUS) to Denver (DEN) flights arrived on time (2,740 scheduled flights). That is 5.8 points above the national average of 77.6%.
Among 4 airlines, SkyWest Airlines led with 86.3% on time and Southwest Airlines was last with 80.4%.
Over 24 months, Saturday was the most reliable day (84% on time) and June the worst month (72%).
The cancellation rate was 0.6% (US average 1.8%).
TUS 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 |
|---|---|---|---|---|
| SkyWest Airlines | 86.3% | 94 min | 0.5% | 590 |
| United Airlines | 85.7% | 75 min | 0.5% | 866 |
| Frontier Airlines | 81.2% | 51 min | 1.2% | 86 |
| Southwest Airlines | 80.4% | 59 min | 0.6% | 1,198 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly TUS to DEN
On-time arrival % by scheduled departure hour (local time), 5,516 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.6% | 0.2% | 437 |
| 6am–7am | 92.8% | 0.4% | 798 |
| 7am–8am | 91.3% | 0.3% | 379 |
| 8am–9am | 87.3% | 0.0% | 260 |
| 9am–10am | 89.3% | 0.0% | 487 |
| 10am–11am | 86.6% | 1.2% | 575 |
| 11am–12pm | 85.3% | 0.9% | 220 |
| 12pm–1pm | 78.3% | 1.6% | 123 |
| 1pm–2pm | 74.1% | 0.5% | 649 |
| 2pm–3pm | 72.3% | 0.7% | 437 |
| 3pm–4pm | 57.2% | 0.4% | 273 |
| 4pm–5pm | 70.3% | 0.8% | 390 |
| 5pm–6pm | 86.3% | 0.3% | 374 |
| 6pm–7pm | 68.3% | 0.0% | 60 |
| 7pm–8pm | 80.4% | 1.9% | 52 |
| 8pm–9pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on TUS 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) | 83.3% | -0.9 pts | 0.0% | 120 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.6% | +0.3 pts | 0.0% | 266 |
| Summer peak (Jun 15 - Aug 15) | 74.5% | -9.8 pts | 0.6% | 656 |
| All other days | 84.3% | — | 0.5% | 4,474 |
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).