Flight Reliability
UA 4897 · United Airlines
Washington → ROA (IAD–ROA)
76
Usually Fine
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 17 min
- Average arrival delay
- 1.0%
- Cancelled
- 5 min early
- Median arrival delay
Based on 205 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
UA 4897 arrived on time 88% of the time on Saturdays and just 59% on Wednesdays. That gap is worth planning around.
Slipping a little lately.
UA 4897 arrived on time 79% of the time over the last three months in the data, compared with 84% in the three months before that.
The breakdown
- Mon84%(25 flights)
- Tue77%(22 flights)
- Wed59%(22 flights)
- Thu84%(32 flights)
- Fri76%(33 flights)
- Sat88%(33 flights)
- Sun79%(34 flights)
89%
May
Jun 57% → May 89% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 57% | 28 |
| July 2025 | 75% | 16 |
| August 2025 | 75% | 24 |
| September 2025 | 90% | 30 |
| October 2025 | 86% | 29 |
| November 2025 | 78% | 27 |
| December 2025 | 69% | 13 |
| May 2026 | 89% | 28 |
- Departures on time
- 80%
- Diverted
- 1.0%
- Flights flown
- 201
- Months covered
- 10
Same route, other flights
Keep nerding
Based on 205 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.