Flight Reliability
UA 4889 · United Airlines
Albany → Washington (ALB–IAD)
73
Usually Fine
WanderNerd Reliability Score
- 73%
- Arrive within 15 minutes
- 21 min
- Average arrival delay
- 0.3%
- Cancelled
- 10 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Tuesdays have been rough.
UA 4889 arrived on time 82% of the time on Wednesdays and just 65% on Tuesdays. That gap is worth planning around.
A bit behind the United Airlines network.
UA 4889 arrived on time 73% of the time, versus 79% across the United Airlines network.
It basically never cancels.
Out of 365 scheduled flights, only 0.3% were cancelled.
Trending in the right direction.
UA 4889 arrived on time 82% of the time over the last three months in the data, compared with 66% in the three months before that.
The breakdown
- Mon71%(52 flights)
- Tue65%(52 flights)
- Wed82%(51 flights)
- Thu69%(52 flights)
- Fri81%(52 flights)
- Sat75%(52 flights)
- Sun69%(52 flights)
94%
May
Jun 80% → May 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 30 |
| July 2025 | 61% | 31 |
| August 2025 | 71% | 31 |
| September 2025 | 67% | 30 |
| October 2025 | 77% | 31 |
| November 2025 | 80% | 30 |
| December 2025 | 50% | 30 |
| January 2026 | 73% | 30 |
| February 2026 | 75% | 28 |
| March 2026 | 71% | 31 |
| April 2026 | 80% | 30 |
| May 2026 | 94% | 31 |
- Departures on time
- 72%
- Diverted
- 0.3%
- Flights flown
- 363
- 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.