Flight Reliability
UA 2143 · United Airlines
Newark → San Juan (EWR–SJU)
53
A Little Dicey
WanderNerd Reliability Score
- 70%
- Arrive within 15 minutes
- 21 min
- Average arrival delay
- 4.4%
- Cancelled
- 5 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 2143 arrived on time 84% of the time on Tuesdays and just 57% on Sundays. That gap is worth planning around.
Lagging the United Airlines network.
UA 2143 arrived on time 70% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 2143 was cancelled 4.4% of the time. Typical for U.S. flights is around 1–2%.
Trending in the right direction.
UA 2143 arrived on time 79% of the time over the last three months in the data, compared with 66% in the three months before that.
The breakdown
- Mon61%(49 flights)
- Tue84%(51 flights)
- Wed74%(50 flights)
- Thu74%(50 flights)
- Fri67%(49 flights)
- Sat68%(50 flights)
- Sun57%(49 flights)
87%
May
Jun 79% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 79% | 28 |
| July 2025 | 66% | 29 |
| August 2025 | 83% | 30 |
| September 2025 | 73% | 30 |
| October 2025 | 52% | 29 |
| November 2025 | 42% | 26 |
| December 2025 | 60% | 30 |
| January 2026 | 76% | 29 |
| February 2026 | 62% | 26 |
| March 2026 | 81% | 31 |
| April 2026 | 70% | 30 |
| May 2026 | 87% | 30 |
- Departures on time
- 74%
- Diverted
- 0.3%
- Flights flown
- 348
- 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.