Flight number record
B6 1604
JetBlue Airways · San Juan to New York
- Route
- SJU → JFK
- Departs
- 14:25
- Flights
- 347
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 1604, check with JetBlue Airways.
B6 1604 lands a B−, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 347 flights, with a median arrival 8 minutes early.
Key figures
On time
79.9%
Arrivals under 15 minutes late, of 334 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
3.46%
National rate is 1.89%
1 hour+ late
9.6%
National rate is 8.3%
These figures cover 347 flights between September 2025 and August 2026. Beyond the headline rate, 9.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 1604 flies
B6 1604 flies SJU to JFK without a single fixed slot. Its most common scheduled departure was 14:25, used on 50 of 347 flights.
- Departs 14:2550 flights14.4%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 14:25 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and B6 1604 runs 8 points better at 79.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
B6 1604 next to SJU to JFK
Every carrier on SJU to JFK combined arrived on time 77.8% of the time across 3,560 flights, so B6 1604 is 2 points ahead of it. JetBlue flew 2,250 flights on the same city pair under all its flight numbers, including this one, and those ran 72.4% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1604thin sample | 347 | 79.9% | 76 min | 3.46% | B− |
| All JetBlue Airways on SJU–JFK | 2,250 | 72.4% | 85 min | 4.84% | C− |
| All carriers on SJU–JFK | 3,560 | 77.8% | 82 min | 3.93% | B− |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 1604 quarter by quarter
B6 1604 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jul–Sep 2026 at 49.1%, a swing of 41 points on roughly 69 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202591 flights89.0%
- Jan–Mar 202690 flights85.5%
- Apr–Jun 202674 flights82.2%
- Jul–Sep 202662 flights49.1%
Scale runs 40% to 95%.
By weekday, B6 1604 ranged from 75.0% on Sunday to 85.7% on Friday. With about 50 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late B6 1604 runs when it is late
B6 1604 often beats the schedule: 123 of 334 completed flights, 37%, arrived 15 minutes or more early. The 67 late arrivals split 21 under half an hour, 14 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early123 flights36.8%
- Within 15 min144 flights43.1%
- 15–29 min late21 flights6.3%
- 30–59 min late14 flights4.2%
- 1–2 hours late18 flights5.4%
- 2+ hours late14 flights4.2%
Scale runs 0% to 100%.
Share of 334 completed flights by arrival against schedule.
16 of 72 late departures made up the time and arrived on time, 22% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for B6 1604
The latest arrival of the period was on 11 August 2026, 5 hours 25 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 August 2026 | 5 hours 25 minutes | Carrier |
| 23 July 2026 | 4 hours 36 minutes | Late-arriving aircraft |
| 14 August 2026 | 4 hours 11 minutes | Late-arriving aircraft |
| 22 July 2026 | 3 hours 29 minutes | Late-arriving aircraft |
| 18 October 2025 | 3 hours 11 minutes | Late-arriving aircraft |
Delay causes
Why B6 1604 runs late
Late-arriving aircraft accounts for 56% of the 5,076 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Late-arriving aircraft
- 37%Carrier
- 7%National Airspace System
56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,076 reported delay minutes here, that single category outweighs weather by 56 to one. The split is drawn from 5,076 delay minutes reported on B6 1604.
Cancellations run at 3.46%, against 1.89% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
9.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,598 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 347 flights under B6 1604 in the data flew SJU to JFK. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 347 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking B6 1604
For a booking, the cancellation rate is the figure to plan around on B6 1604: 3.46% of its 347 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- SJU to JFK, every carrier and departure
- JFK to SJU, the return direction
- Delta Air Lines 1854 on the same route92.5%
- JetBlue Airways 904 on the same route77.7%
- Delta Air Lines 1961 on the same route87.7%
- Delta Air Lines 1966 on the same route83.6%
- JetBlue Airways 1004 on the same route64.2%
- Luis Munoz Marin International (SJU) delay statistics
- John F. Kennedy International (JFK) delay statistics
- JetBlue Airways on-time record
- Every JetBlue Airways flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means JetBlue Airways’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.