Flight Reliability
UA 4945 · United Airlines
Washington → ITH (IAD–ITH)
52
A Little Dicey
WanderNerd Reliability Score
- 70%
- Arrive within 15 minutes
- 23 min
- Average arrival delay
- 4.1%
- Cancelled
- 3 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 4945 arrived on time 77% of the time on Tuesdays and just 61% on Sundays. That gap is worth planning around.
A bit behind the IAD–ITH route.
UA 4945 arrived on time 70% of the time, versus 73% across the IAD–ITH route.
Lagging the United Airlines network.
UA 4945 arrived on time 70% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 4945 was cancelled 4.1% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon68%(50 flights)
- Tue77%(51 flights)
- Wed69%(45 flights)
- Thu71%(51 flights)
- Fri73%(51 flights)
- Sat74%(50 flights)
- Sun61%(49 flights)
83%
May
Jun 60% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 30 |
| July 2025 | 60% | 25 |
| August 2025 | 55% | 31 |
| September 2025 | 80% | 30 |
| October 2025 | 77% | 31 |
| November 2025 | 83% | 29 |
| December 2025 | 66% | 29 |
| January 2026 | 70% | 30 |
| February 2026 | 76% | 25 |
| March 2026 | 64% | 28 |
| April 2026 | 70% | 30 |
| May 2026 | 83% | 29 |
- Departures on time
- 77%
- Diverted
- 0.8%
- Flights flown
- 347
- 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.