Flight Reliability
UA 5817 · United Airlines
Denver → DRO (DEN–DRO)
70
Usually Fine
WanderNerd Reliability Score
- 77%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 3.3%
- Cancelled
- 6 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Thursday is the weak spot.
UA 5817 arrived on time 81% of the time on Tuesdays. On Thursdays: 71%.
A bit behind the DEN–DRO route.
UA 5817 arrived on time 77% of the time, versus 80% across the DEN–DRO route.
Keep a backup plan handy.
UA 5817 was cancelled 3.3% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon78%(51 flights)
- Tue81%(48 flights)
- Wed78%(51 flights)
- Thu71%(51 flights)
- Fri72%(50 flights)
- Sat78%(50 flights)
- Sun78%(50 flights)
71%
May
Jun 79% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 79% | 29 |
| July 2025 | 58% | 31 |
| August 2025 | 70% | 30 |
| September 2025 | 83% | 30 |
| October 2025 | 81% | 31 |
| November 2025 | 91% | 21 |
| December 2025 | 77% | 31 |
| January 2026 | 77% | 31 |
| February 2026 | 78% | 27 |
| March 2026 | 79% | 29 |
| April 2026 | 80% | 30 |
| May 2026 | 71% | 31 |
- Departures on time
- 77%
- Diverted
- 0.3%
- Flights flown
- 351
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.