Flight Reliability
B6 1235 · JetBlue Airways
Boston → San Juan (BOS–SJU)
78
Usually Fine
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 21 min
- Average arrival delay
- 0%
- Cancelled
- 1 min
- Median arrival delay
Based on 60 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
B6 1235 arrived on time 92% of the time on Saturdays and just 58% on Thursdays. That gap is worth planning around.
A bit ahead of the BOS–SJU route.
B6 1235 arrived on time 75% of the time, versus 70% across the BOS–SJU route.
The breakdown
- Mon67%(12 flights)
- Tue—(0 flights)
- Wed—(0 flights)
- Thu58%(12 flights)
- Fri83%(12 flights)
- Sat92%(12 flights)
- Sun75%(12 flights)
78%
Aug
Jun 73% → Aug 78% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 15 |
| July 2025 | 71% | 21 |
| August 2025 | 78% | 23 |
- Departures on time
- 75%
- Diverted
- 0%
- Flights flown
- 60
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 60 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.