Flight Reliability
UA 5781 · United Airlines
Denver → Aspen (DEN–ASE)84% of its flights flew this route. The rest (MFR–DEN, ORD–CVG) are included in these numbers.
- 75%
- Arrive within 15 minutes
- 40 min
- Average arrival delay
- 5.8%
- Cancelled
- 8 min early
- Median arrival delay
Based on 345 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
UA 5781 departing between 12–3 PM arrived on time 78% of the time, versus 61% between 3–6 PM.
Friday is doing you no favors.
UA 5781 arrived on time 88% of the time on Saturdays and just 66% on Fridays. That gap is worth planning around.
A bit behind the United Airlines network.
UA 5781 arrived on time 75% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 5781 was cancelled 5.8% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon81%(47 flights)
- Tue79%(47 flights)
- Wed71%(48 flights)
- Thu67%(46 flights)
- Fri66%(44 flights)
- Sat88%(41 flights)
- Sun76%(49 flights)
- 12–3 PM78%(36 flights)
- 3–6 PM61%(18 flights)
- 6–9 PM76%(268 flights)
Jun 57% → May 62% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 57% | 30 |
| July 2025 | 48% | 25 |
| August 2025 | 69% | 29 |
| September 2025 | 80% | 30 |
| October 2025 | 87% | 30 |
| November 2025 | 76% | 29 |
| December 2025 | 75% | 24 |
| January 2026 | 86% | 29 |
| February 2026 | 87% | 23 |
| March 2026 | 89% | 28 |
| April 2026 | 90% | 19 |
| May 2026 | 62% | 26 |
- Departures on time
- 74%
- Diverted
- 0.9%
- Flights flown
- 322
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 345 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.