Flight Reliability
UA 4930 · United Airlines
Washington → Manchester (IAD–MHT)
66
Usually Fine
WanderNerd Reliability Score
- 73%
- Arrive within 15 minutes
- 27 min
- Average arrival delay
- 1.8%
- Cancelled
- 7 min early
- Median arrival delay
Based on 339 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
UA 4930 arrived on time 81% of the time on Wednesdays and just 65% on Fridays. That gap is worth planning around.
A bit behind the United Airlines network.
UA 4930 arrived on time 73% of the time, versus 79% across the United Airlines network.
Trending in the right direction.
UA 4930 arrived on time 86% of the time over the last three months in the data, compared with 76% in the three months before that.
The breakdown
- Mon76%(50 flights)
- Tue68%(50 flights)
- Wed81%(52 flights)
- Thu73%(51 flights)
- Fri65%(52 flights)
- Sat74%(34 flights)
- Sun77%(44 flights)
87%
May
Jun 37% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 37% | 27 |
| July 2025 | 52% | 23 |
| August 2025 | 72% | 25 |
| September 2025 | 70% | 30 |
| October 2025 | 71% | 31 |
| November 2025 | 88% | 25 |
| December 2025 | 67% | 30 |
| January 2026 | 76% | 25 |
| February 2026 | 85% | 26 |
| March 2026 | 87% | 30 |
| April 2026 | 83% | 30 |
| May 2026 | 87% | 31 |
- Departures on time
- 73%
- Diverted
- 0%
- Flights flown
- 333
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 339 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.