Best Time to Fly PIT to DEN: On-Time Stats by Hour & Airline
Pittsburgh International → Denver International
Data through July 2026 · Last updated October 18, 2026
1,659 flights were scheduled from Pittsburgh (PIT) to Denver (DEN) in the last 12 months, and 81.8% of those that flew arrived on time, 4.2 points above the US average of 77.6%.
Among 3 airlines, United Airlines led with 87.0% on time and Southwest Airlines was last with 76.1%.
Over 24 months, Wednesday was the most reliable day (84% on time) and June the worst month (68%).
The cancellation rate was 0.7% (US average 1.8%).
PIT 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 |
|---|---|---|---|---|
| United Airlines | 87.0% | 64 min | 0.7% | 851 |
| Frontier Airlines | 82.9% | 63 min | 0.0% | 41 |
| Southwest Airlines | 76.1% | 57 min | 0.8% | 767 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PIT to DEN
On-time arrival % by scheduled departure hour (local time), 3,385 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 92.9% | 0.3% | 369 |
| 6am–7am | 92.3% | 0.0% | 117 |
| 7am–8am | 93.8% | 1.2% | 81 |
| 8am–9am | 89.5% | 0.7% | 728 |
| 9am–10am | 98.0% | 0.0% | 50 |
| 10am–11am | 92.5% | 0.0% | 332 |
| 11am–12pm | Limited data | 28 | |
| 12pm–1pm | 87.5% | 0.0% | 80 |
| 1pm–2pm | 74.7% | 1.1% | 88 |
| 2pm–3pm | Limited data | 21 | |
| 3pm–4pm | 72.7% | 0.0% | 33 |
| 4pm–5pm | 77.3% | 0.4% | 780 |
| 5pm–6pm | 68.5% | 0.0% | 182 |
| 6pm–7pm | 55.5% | 0.6% | 314 |
| 7pm–8pm | 57.4% | 0.0% | 101 |
| 8pm–9pm | 72.6% | 2.7% | 75 |
| 9pm–10pm | Limited data | 3 | |
| 10pm–11pm | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PIT 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) | 85.9% | +2.6 pts | 0.0% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.6% | -4.7 pts | 1.4% | 147 |
| Summer peak (Jun 15 - Aug 15) | 73.7% | -9.7 pts | 0.4% | 676 |
| All other days | 83.3% | — | 0.4% | 2,491 |
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).