Flight Reliability
UA 4340 · United Airlines
Huntsville → Washington (HSV–IAD)
87
Pretty Reliable
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.3%
- Cancelled
- 12 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
UA 4340 arrived on time 92% of the time on Wednesdays and just 75% on Fridays. That gap is worth planning around.
A bit ahead of the United Airlines network.
UA 4340 arrived on time 83% of the time, versus 79% across the United Airlines network.
It basically never cancels.
Out of 365 scheduled flights, only 0.3% were cancelled.
The breakdown
- Mon87%(52 flights)
- Tue86%(51 flights)
- Wed92%(51 flights)
- Thu86%(51 flights)
- Fri75%(52 flights)
- Sat77%(52 flights)
- Sun81%(52 flights)
84%
May
Jun 75% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 75% | 28 |
| July 2025 | 73% | 30 |
| August 2025 | 74% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 87% | 30 |
| December 2025 | 81% | 31 |
| January 2026 | 83% | 30 |
| February 2026 | 93% | 28 |
| March 2026 | 74% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 84% | 31 |
- Departures on time
- 87%
- Diverted
- 0.8%
- Flights flown
- 361
- 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.