Pittsburgh (PIT) to Denver (DEN): On-Time Performance
Data through July 2026
Pittsburgh (PIT) to Denver (DEN) effectively runs on two schedules. In September 2024, 94% of arrivals were on time; in June 2025 that fell to 67% — a 28-point seasonal swing. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 62%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 4.5
- last 12 months
- Duration
- 3h 33m
- scheduled
- Distance
- 1,290 mi
Best airline from PIT to DEN
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 85% | 10 min | 0.6% | 1,807 |
| Southwest Airlines | 77% | 15 min | 0.4% | 1,639 |
| Frontier Airlines | 76% | 26 min | 0.8% | 125 |
Monthly on-time trend
Best time to fly from PIT to DEN
Aim for departures around 9 a.m. (98% on-time); avoid 6 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 84% | 12 min |
| Tuesday | 82% | 12 min |
| Wednesday | 84% | 12 min |
| Thursday | 79% | 13 min |
| Friday | 78% | 14 min |
| Saturday | 80% | 13 min |
| Sunday | 82% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft34%
- Airline operations25%
- National airspace system37%
- Weather4%
Frequently asked questions
- How often are flights from PIT to DEN delayed?
- 19% of PIT–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from PIT to DEN?
- United Airlines has the best on-time record on this route at 85%, based on 1,807 flights. 3 airlines flew PIT–DEN frequently enough to compare in this period.
- What is the best time of day to fly from PIT to DEN?
- Departures around 9 a.m. have the best record (98% on-time), while departures around 6 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PIT to DEN?
- The scheduled PIT–DEN flight time averages 3h 33m over 1,290 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are PIT to DEN flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from PIT to DEN?
- June 2025 was the roughest month in this dataset, with only 67% of arrivals on time. The best was September 2024 at 94%. If your dates are flexible, that 28-point gap is worth planning around.
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Based on 3,571 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.