Flight Reliability
UA 1173 · United Airlines
San Juan → Newark (SJU–EWR)
40
Bring Snacks
WanderNerd Reliability Score
- 64%
- Arrive within 15 minutes
- 28 min
- Average arrival delay
- 5.2%
- Cancelled
- 4 min
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 1173 arrived on time 69% of the time on Saturdays and just 52% on Sundays. That gap is worth planning around.
Lagging the SJU–EWR route.
UA 1173 arrived on time 64% of the time, versus 75% across the SJU–EWR route.
Well behind the United Airlines network.
UA 1173 arrived on time 64% of the time, versus 79% across the United Airlines network.
Keep a backup plan handy.
UA 1173 was cancelled 5.2% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon60%(50 flights)
- Tue69%(51 flights)
- Wed67%(48 flights)
- Thu65%(51 flights)
- Fri63%(49 flights)
- Sat69%(48 flights)
- Sun52%(48 flights)
80%
May
Jun 62% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 62% | 26 |
| July 2025 | 30% | 30 |
| August 2025 | 65% | 31 |
| September 2025 | 62% | 29 |
| October 2025 | 59% | 27 |
| November 2025 | 56% | 25 |
| December 2025 | 68% | 31 |
| January 2026 | 59% | 29 |
| February 2026 | 65% | 26 |
| March 2026 | 84% | 31 |
| April 2026 | 70% | 30 |
| May 2026 | 80% | 30 |
- Departures on time
- 69%
- Diverted
- 0.3%
- Flights flown
- 345
- 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.