Flight profile · JetBlue
B6304
San Juan (SJU) to New York (JFK) · scheduled 6:05 PM – 10:02 PM
How B6304 performs
511 operations, 2023-11-17 to 2026-06-30.
B6304 arrived on time 76.1% of the time, against 79.6% for all SJU → JFK flights — this specific departure is 3.5 percentage points worse than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 511 operations between 2023-11-17 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| B6304 | 76.1% | 2.15% | -7 min | 10.6% | 511 |
| JetBlue on SJU → JFK | 76.0% | 1.94% | -7 min | 10.7% | 6,633 |
| All SJU → JFK flights | 79.6% | 1.58% | -9 min | 8.5% | 11,035 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-11-17 to 2026-06-30
Why B6304 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
Share of the delay minutes US DOT attributed to each cause for B6304 on SJU → JFK. 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 SJU → JFK
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1854 | Delta Air Lines | 94.4% | 14 min early | 1,096 |
| DL1961 | Delta Air Lines | 87.8% | 14 min early | 805 |
| DL1877 | Delta Air Lines | 85.4% | 14 min early | 699 |
| B61604 | JetBlue | 82.1% | 10 min early | 972 |
| B6904 | JetBlue | 74.1% | 6 min early | 796 |
| B62404 | JetBlue | 65.7% | 0 min early | 639 |
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 511 records of B6304 operating SJU → JFK, 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.