Flight profile · JetBlue
B61803
New York (JFK) to San Juan (SJU) · scheduled 8:25 PM – 2:31 AM
How B61803 performs
412 operations, 2023-10-29 to 2026-05-20.
B61803 arrived on time 74.3% of the time, against 71.0% for all JFK → SJU flights — this specific departure is 3.3 percentage points better than the route as a whole. Against JetBlue’s own flights on this route it is 7.0 points better.
Source: US DOT Bureau of Transportation Statistics · 412 operations between 2023-10-29 to 2026-05-20
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| B61803 | 74.3% | 1.70% | -5 min | 10.6% | 412 |
| JetBlue on JFK → SJU | 67.4% | 1.81% | -1 min | 14.2% | 6,629 |
| All JFK → SJU flights | 71.0% | 1.51% | -5 min | 11.5% | 11,028 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-10-29 to 2026-05-20
Why B61803 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for B61803 on JFK → SJU. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on JFK → SJU
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1877 | Delta Air Lines | 87.5% | 14 min early | 737 |
| DL1961 | Delta Air Lines | 87.3% | 15 min early | 1,051 |
| B61603 | JetBlue | 80.1% | 8 min early | 763 |
| B6503 | JetBlue | 74.9% | 5 min early | 986 |
| DL1859 | Delta Air Lines | 67.8% | 1 min early | 1,061 |
| B6803 | JetBlue | 64.9% | 0 min early | 917 |
| B61903 | JetBlue | 64.1% | 2 min late | 661 |
| B6403 | JetBlue | 62.8% | 2 min late | 737 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 412 records of B61803 operating JFK → 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.