Flight Reliability
UA 2024 · United Airlines
San Juan → Washington (SJU–IAD)
87
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 0.6%
- Cancelled
- 7 min early
- Median arrival delay
Based on 348 historical flights. Data through May 2026.
What the data says
Skip Saturday if you can.
UA 2024 arrived on time 88% of the time on Tuesdays. On Saturdays: 80%.
A bit ahead of the United Airlines network.
UA 2024 arrived on time 84% of the time, versus 79% across the United Airlines network.
The breakdown
- Mon84%(49 flights)
- Tue88%(48 flights)
- Wed85%(47 flights)
- Thu84%(49 flights)
- Fri83%(48 flights)
- Sat80%(51 flights)
- Sun85%(52 flights)
81%
May
Jun 86% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 29 |
| July 2025 | 73% | 30 |
| August 2025 | 65% | 31 |
| September 2025 | 100% | 13 |
| October 2025 | 90% | 31 |
| November 2025 | 90% | 30 |
| December 2025 | 81% | 31 |
| January 2026 | 90% | 29 |
| February 2026 | 86% | 28 |
| March 2026 | 87% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 81% | 31 |
- Departures on time
- 82%
- Diverted
- 0.6%
- Flights flown
- 344
- 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.