Flight Reliability
UA 4770 · United Airlines
Denver → GJT (DEN–GJT)
66
Usually Fine
WanderNerd Reliability Score
- 74%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 3.0%
- Cancelled
- 5 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
UA 4770 arrived on time 86% of the time on Tuesdays and just 57% on Mondays. That gap is worth planning around.
A bit behind the DEN–GJT route.
UA 4770 arrived on time 74% of the time, versus 79% across the DEN–GJT route.
A bit behind the United Airlines network.
UA 4770 arrived on time 74% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 4770 was cancelled 3.0% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon57%(51 flights)
- Tue86%(49 flights)
- Wed83%(52 flights)
- Thu76%(49 flights)
- Fri69%(49 flights)
- Sat74%(50 flights)
- Sun73%(52 flights)
71%
May
Jun 78% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 78% | 27 |
| July 2025 | 63% | 30 |
| August 2025 | 52% | 31 |
| September 2025 | 70% | 30 |
| October 2025 | 81% | 31 |
| November 2025 | 91% | 23 |
| December 2025 | 87% | 31 |
| January 2026 | 87% | 30 |
| February 2026 | 82% | 27 |
| March 2026 | 58% | 31 |
| April 2026 | 73% | 30 |
| May 2026 | 71% | 31 |
- Departures on time
- 75%
- Diverted
- 0.3%
- Flights flown
- 352
- 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.