Best Time to Fly DEN to PIT: On-Time Stats by Hour & Airline
Denver International → Pittsburgh International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.7% of Denver (DEN) to Pittsburgh (PIT) flights arrived on time (1,657 scheduled flights). That is 3.9 points below the national average of 77.6%.
Frontier Airlines was the most punctual of the 3 airlines on the route at 97.6%, while Southwest Airlines trailed at 64.5%.
February has been the best month (84% on time) and Thursday the weakest day of the week (70%).
0.4% of flights were cancelled, versus 1.8% nationally.
DEN to PIT 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 |
|---|---|---|---|---|
| Frontier Airlines | 97.6% | 36 min | 0.0% | 41 |
| United Airlines | 80.8% | 57 min | 0.5% | 850 |
| Southwest Airlines | 64.5% | 54 min | 0.3% | 766 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to PIT
On-time arrival % by scheduled departure hour (local time), 3,382 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 3 | |
| 6am–7am | Limited data | 23 | |
| 7am–8am | 72.7% | 0.0% | 44 |
| 8am–9am | 92.2% | 0.0% | 77 |
| 9am–10am | 86.3% | 0.0% | 292 |
| 10am–11am | 82.0% | 0.2% | 901 |
| 11am–12pm | 72.1% | 0.0% | 129 |
| 12pm–1pm | Limited data | 8 | |
| 1pm–2pm | 75.2% | 0.0% | 202 |
| 2pm–3pm | 67.4% | 0.6% | 176 |
| 3pm–4pm | 58.4% | 0.0% | 78 |
| 4pm–5pm | 67.5% | 0.0% | 83 |
| 5pm–6pm | 67.5% | 0.6% | 786 |
| 6pm–7pm | 65.3% | 0.3% | 289 |
| 7pm–8pm | 52.7% | 1.5% | 206 |
| 8pm–9pm | 52.0% | 0.0% | 50 |
| 11pm–12am | 85.7% | 0.0% | 35 |
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 PIT
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) | 84.5% | +7.9 pts | 0.0% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.7% | +0.1 pts | 0.0% | 147 |
| Summer peak (Jun 15 - Aug 15) | 58.5% | -18.2 pts | 0.7% | 674 |
| All other days | 76.6% | — | 0.3% | 2,490 |
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).