Flight Reliability
UA 5638 · United Airlines
DRO → Denver (DRO–DEN)98% of its flights flew this route. The rest (XWA–DEN) are included in these numbers.
84
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 1.4%
- Cancelled
- 11 min early
- Median arrival delay
Based on 350 historical flights. Data through May 2026.
What the data says
Skip Tuesday if you can.
UA 5638 arrived on time 86% of the time on Saturdays. On Tuesdays: 76%.
Slipping a little lately.
UA 5638 arrived on time 80% of the time over the last three months in the data, compared with 83% in the three months before that.
The breakdown
- Mon81%(52 flights)
- Tue76%(46 flights)
- Wed80%(45 flights)
- Thu82%(51 flights)
- Fri84%(49 flights)
- Sat86%(50 flights)
- Sun81%(52 flights)
- 9 AM–12 PM83%(337 flights)
- 6–9 PM—(8 flights)
79%
May
Jun 67% → May 79% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 30 |
| July 2025 | 71% | 31 |
| August 2025 | 81% | 31 |
| September 2025 | 97% | 30 |
| October 2025 | 90% | 31 |
| November 2025 | 85% | 26 |
| December 2025 | 87% | 31 |
| January 2026 | 91% | 23 |
| February 2026 | 71% | 24 |
| March 2026 | 70% | 30 |
| April 2026 | 90% | 30 |
| May 2026 | 79% | 28 |
- Departures on time
- 85%
- Diverted
- 0%
- Flights flown
- 345
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 350 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.