Flight Reliability
UA 4235 · United Airlines
Albany → Washington (ALB–IAD)
57
A Little Dicey
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 29 min
- Average arrival delay
- 2.8%
- Cancelled
- 3 min early
- Median arrival delay
Based on 363 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 4235 arrived on time 80% of the time on Thursdays and just 62% on Sundays. That gap is worth planning around.
Lagging the United Airlines network.
UA 4235 arrived on time 71% of the time, versus 79% across the United Airlines network.
The breakdown
- Mon74%(50 flights)
- Tue77%(51 flights)
- Wed70%(50 flights)
- Thu80%(51 flights)
- Fri63%(49 flights)
- Sat73%(51 flights)
- Sun62%(50 flights)
70%
May
Jun 48% → May 70% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 48% | 29 |
| July 2025 | 46% | 26 |
| August 2025 | 71% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 71% | 31 |
| November 2025 | 62% | 29 |
| December 2025 | 60% | 30 |
| January 2026 | 87% | 30 |
| February 2026 | 85% | 27 |
| March 2026 | 72% | 29 |
| April 2026 | 93% | 30 |
| May 2026 | 70% | 30 |
- Departures on time
- 68%
- Diverted
- 0.3%
- Flights flown
- 352
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 363 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.