Flight Reliability
UA 4328 · United Airlines
CHO → Washington (CHO–IAD)96% of its flights flew this route. The rest (IAH–MOB, IAH–MFE) are included in these numbers.
83
Pretty Reliable
WanderNerd Reliability Score
- 85%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 1.5%
- Cancelled
- 10 min early
- Median arrival delay
Based on 334 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
UA 4328 departing between 3–6 PM arrived on time 94% of the time, versus 84% between 12–3 PM.
Mondays have been rough.
UA 4328 arrived on time 92% of the time on Wednesdays and just 75% on Mondays. That gap is worth planning around.
A bit ahead of the United Airlines network.
UA 4328 arrived on time 85% of the time, versus 79% across the United Airlines network.
The breakdown
- Mon75%(51 flights)
- Tue86%(49 flights)
- Wed92%(51 flights)
- Thu85%(52 flights)
- Fri86%(42 flights)
- Sat88%(32 flights)
- Sun82%(51 flights)
- 12–3 PM84%(304 flights)
- 3–6 PM94%(18 flights)
- 6–9 PM—(6 flights)
84%
May
Jun 79% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 79% | 28 |
| July 2025 | 70% | 20 |
| August 2025 | 89% | 28 |
| September 2025 | 92% | 25 |
| October 2025 | 83% | 23 |
| November 2025 | 86% | 29 |
| December 2025 | 85% | 27 |
| January 2026 | 86% | 28 |
| February 2026 | 89% | 28 |
| March 2026 | 77% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 84% | 31 |
- Departures on time
- 85%
- Diverted
- 0.3%
- Flights flown
- 328
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 334 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.