Denver (DEN) to Pittsburgh (PIT): On-Time Performance
Data through May 2026
When you fly DEN to PIT matters as much as anything else about the booking: the route swung from 91% on-time in February 2026 to just 52% in June 2025. Across the full period the route averages 74% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 66%), which matters most in the rough months.
- On-time
- 74%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 4.7
- last 12 months
- Duration
- 3h 2m
- scheduled
- Distance
- 1,290 mi
Best airline from DEN to PIT
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 85% | 17 min | 0.0% | 138 |
| United Airlines | 79% | 13 min | 0.3% | 1,770 |
| Southwest Airlines | 67% | 20 min | 0.5% | 1,552 |
Monthly on-time trend
Best time to fly from DEN to PIT
Aim for departures around 6 a.m. (94% on-time); avoid 8 p.m. departures (54%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 15 min |
| Tuesday | 74% | 16 min |
| Wednesday | 74% | 14 min |
| Thursday | 72% | 20 min |
| Friday | 73% | 17 min |
| Saturday | 75% | 15 min |
| Sundaybest | 77% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft53%
- Airline operations31%
- National airspace system15%
- Weather1%
Frequently asked questions
- How often are flights from DEN to PIT delayed?
- 26% of DEN–PIT flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 16 minutes.
- Which airline is most reliable from DEN to PIT?
- Frontier Airlines has the best on-time record on this route at 85%, based on 138 flights. 3 airlines flew DEN–PIT frequently enough to compare in this period.
- What is the best time of day to fly from DEN to PIT?
- Departures around 6 a.m. have the best record (94% on-time), while departures around 8 p.m. have the worst (54%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to PIT?
- The scheduled DEN–PIT flight time averages 3h 2m over 1,290 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are DEN to PIT flights cancelled?
- 0.4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to PIT?
- June 2025 was the roughest month in this dataset, with only 52% of arrivals on time. The best was February 2026 at 91%. If your dates are flexible, that 40-point gap is worth planning around.
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Based on 3,460 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.