Flight profile · JetBlue
B6561
Boston (BOS) to San Juan (SJU) · scheduled 8:45 PM – 12:49 AM
How B6561 performs
928 operations, 2023-07-01 to 2026-06-30.
B6561 arrived on time 64.2% of the time, against 67.8% for all BOS → SJU flights — this specific departure is 3.6 percentage points worse than the route as a whole. Against JetBlue’s own flights on this route it is 3.7 points worse.
Source: US DOT Bureau of Transportation Statistics · 928 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| B6561 | 64.2% | 1.51% | 2 min | 14.4% | 928 |
| JetBlue on BOS → SJU | 67.9% | 1.33% | 0 min | 12.5% | 3,770 |
| All BOS → SJU flights | 67.8% | 1.60% | 0 min | 12.2% | 5,869 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does B6561 run worse on particular days?
Wednesday is historically the most reliable day and Sunday the least, a gap of 11.9 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes B6561 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| LGA→PBI New York to West Palm Beach | 2024-09-04 – 2024-10-26 | 53 | — |
Because the same number has served different journeys, the statistics above describe only the route B6561 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 928 records of B6561 operating BOS → SJU, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.