Flight Reliability
UA 4815 · United Airlines
Washington → CHO (IAD–CHO)100% of its flights flew this route. The rest (IAD–CMH) are included in these numbers.
86
Pretty Reliable
WanderNerd Reliability Score
- 82%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 0.9%
- Cancelled
- 7 min early
- Median arrival delay
Based on 320 historical flights. Data through May 2026.
What the data says
Skip Monday if you can.
UA 4815 arrived on time 89% of the time on Wednesdays. On Mondays: 78%.
A bit ahead of the United Airlines network.
UA 4815 arrived on time 82% of the time, versus 79% across the United Airlines network.
Ticking up lately.
UA 4815 arrived on time 85% of the time over the last three months in the data, compared with 80% in the three months before that.
The breakdown
- Mon78%(51 flights)
- Tue82%(51 flights)
- Wed89%(52 flights)
- Thu81%(52 flights)
- Fri82%(39 flights)
- Sat81%(21 flights)
- Sun80%(51 flights)
84%
May
Jun 86% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 28 |
| July 2025 | 57% | 23 |
| August 2025 | 91% | 22 |
| September 2025 | 84% | 25 |
| October 2025 | 83% | 23 |
| November 2025 | 86% | 29 |
| December 2025 | 70% | 27 |
| January 2026 | 88% | 24 |
| February 2026 | 83% | 24 |
| March 2026 | 81% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 84% | 31 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 317
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 320 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.