Flight Reliability
UA 4690 · United Airlines
Birmingham → Denver (BHM–DEN)91% of its flights flew this route. The rest (CLT–IAH, BUF–ORD) are included in these numbers.
77
Usually Fine
WanderNerd Reliability Score
- 78%
- Arrive within 15 minutes
- 14 min
- Average arrival delay
- 0.3%
- Cancelled
- 5 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
UA 4690 departing between 3–6 PM arrived on time 79% of the time, versus 55% between 9 AM–12 PM.
Friday is doing you no favors.
UA 4690 arrived on time 84% of the time on Thursdays. On Fridays: 73%.
A bit behind the BHM–DEN route.
UA 4690 arrived on time 78% of the time, versus 84% across the BHM–DEN route.
It basically never cancels.
Out of 365 scheduled flights, only 0.3% were cancelled.
The breakdown
- Mon75%(51 flights)
- Tue78%(51 flights)
- Wed80%(51 flights)
- Thu84%(50 flights)
- Fri73%(52 flights)
- Sat78%(51 flights)
- Sun77%(53 flights)
- 9 AM–12 PM55%(11 flights)
- 12–3 PM—(1 flights)
- 3–6 PM79%(347 flights)
71%
May
Jun 55% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 55% | 29 |
| July 2025 | 62% | 29 |
| August 2025 | 59% | 29 |
| September 2025 | 73% | 30 |
| October 2025 | 81% | 31 |
| November 2025 | 87% | 30 |
| December 2025 | 90% | 31 |
| January 2026 | 94% | 31 |
| February 2026 | 89% | 28 |
| March 2026 | 87% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 71% | 31 |
- Departures on time
- 80%
- Diverted
- 1.4%
- Flights flown
- 359
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.