Flight Reliability
UA 4281 · United Airlines
CHO → Washington (CHO–IAD)97% of its flights flew this route. The rest (IAD–BDL, IAD–ROC) are included in these numbers.
85
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 2.0%
- Cancelled
- 10 min early
- Median arrival delay
Based on 348 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 4281 arrived on time 93% of the time on Wednesdays. On Sundays: 80%.
Better than the United Airlines network average.
UA 4281 arrived on time 86% of the time, versus 79% across the United Airlines network.
Trending in the right direction.
UA 4281 arrived on time 91% of the time over the last three months in the data, compared with 83% in the three months before that.
The breakdown
- Mon86%(51 flights)
- Tue84%(51 flights)
- Wed93%(44 flights)
- Thu88%(51 flights)
- Fri84%(51 flights)
- Sat88%(48 flights)
- Sun80%(44 flights)
- 6–9 AM—(3 flights)
- 9 AM–12 PM86%(329 flights)
- 12–3 PM—(6 flights)
- 6–9 PM—(2 flights)
97%
May
Jun 74% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 27 |
| July 2025 | 81% | 21 |
| August 2025 | 89% | 26 |
| September 2025 | 90% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 89% | 27 |
| December 2025 | 77% | 30 |
| January 2026 | 90% | 29 |
| February 2026 | 82% | 27 |
| March 2026 | 87% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 97% | 31 |
- Departures on time
- 87%
- Diverted
- 0.3%
- Flights flown
- 340
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 348 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.