Flight Reliability
UA 4940 · United Airlines
CHO → Washington (CHO–IAD)
56
A Little Dicey
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 30 min
- Average arrival delay
- 4.3%
- Cancelled
- 9 min early
- Median arrival delay
Based on 161 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
UA 4940 arrived on time 91% of the time on Tuesdays and just 67% on Fridays. That gap is worth planning around.
Lagging the CHO–IAD route.
UA 4940 arrived on time 75% of the time, versus 85% across the CHO–IAD route.
A bit behind the United Airlines network.
UA 4940 arrived on time 75% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 4940 was cancelled 4.3% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon77%(26 flights)
- Tue91%(11 flights)
- Wed79%(14 flights)
- Thu73%(26 flights)
- Fri67%(24 flights)
- Sat73%(26 flights)
- Sun78%(27 flights)
57%
May
Jun 70% → May 57% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 70% | 23 |
| October 2025 | 90% | 29 |
| November 2025 | 91% | 21 |
| December 2025 | 71% | 14 |
| March 2026 | 67% | 21 |
| April 2026 | 67% | 21 |
| May 2026 | 57% | 14 |
- Departures on time
- 73%
- Diverted
- 0%
- Flights flown
- 154
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 161 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.