Flight Reliability
UA 4325 · United Airlines
Knoxville → Washington (TYS–IAD)
85
Pretty Reliable
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 1.6%
- Cancelled
- 10 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 4325 arrived on time 90% of the time on Saturdays and just 73% on Sundays. That gap is worth planning around.
A bit ahead of the United Airlines network.
UA 4325 arrived on time 83% of the time, versus 79% across the United Airlines network.
Ticking up lately.
UA 4325 arrived on time 82% of the time over the last three months in the data, compared with 79% in the three months before that.
The breakdown
- Mon88%(51 flights)
- Tue81%(52 flights)
- Wed88%(51 flights)
- Thu81%(52 flights)
- Fri81%(52 flights)
- Sat90%(50 flights)
- Sun73%(51 flights)
81%
May
Jun 80% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 30 |
| July 2025 | 77% | 30 |
| August 2025 | 87% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 97% | 31 |
| November 2025 | 83% | 30 |
| December 2025 | 77% | 31 |
| January 2026 | 82% | 27 |
| February 2026 | 79% | 28 |
| March 2026 | 80% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 81% | 31 |
- Departures on time
- 87%
- Diverted
- 0%
- Flights flown
- 359
- 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.