Flight Reliability
UA 5766 · United Airlines
Aspen → Denver (ASE–DEN)99% of its flights flew this route. The rest (SFO–SEA, ORD–XNA) are included in these numbers.
- 80%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 4.1%
- Cancelled
- 13 min early
- Median arrival delay
Based on 340 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
UA 5766 arrived on time 87% of the time on Fridays and just 72% on Mondays. That gap is worth planning around.
A bit ahead of the ASE–DEN route.
UA 5766 arrived on time 80% of the time, versus 74% across the ASE–DEN route.
Keep a backup plan handy.
UA 5766 was cancelled 4.1% of the time. Typical for U.S. flights is around 1–2%.
Trending in the right direction.
UA 5766 arrived on time 95% of the time over the last three months in the data, compared with 85% in the three months before that.
The breakdown
- Mon72%(46 flights)
- Tue85%(47 flights)
- Wed85%(48 flights)
- Thu76%(45 flights)
- Fri87%(46 flights)
- Sat76%(46 flights)
- Sun77%(48 flights)
- 6–9 AM80%(322 flights)
- 9 AM–12 PM—(3 flights)
- 12–3 PM—(1 flights)
Jun 47% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 47% | 30 |
| July 2025 | 41% | 29 |
| August 2025 | 80% | 30 |
| September 2025 | 90% | 30 |
| October 2025 | 81% | 31 |
| November 2025 | 93% | 30 |
| December 2025 | 79% | 29 |
| January 2026 | 93% | 29 |
| February 2026 | 84% | 25 |
| March 2026 | 93% | 28 |
| April 2026 | 91% | 22 |
| May 2026 | 100% | 13 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 326
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 340 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.