Flight number record
B6 544
JetBlue Airways · West Palm Beach to Islip
- Route
- PBI → ISP
- Departs
- 10:09
- Flights
- 334
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 544, check with JetBlue Airways.
B6 544 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 about an hour on average. That rests on 334 flights, with a median arrival 8 minutes early.
Key figures
On time
80.2%
Arrivals under 15 minutes late, of 329 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.90%
National rate is 1.89%
1 hour+ late
7.6%
National rate is 8.3%
These figures cover 334 flights between September 2025 and August 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When B6 544 flies
B6 544 flies PBI to ISP without a single fixed slot. Its most common scheduled departure was 10:09, used on 53 of 334 flights, with 11:20 (39 flights) and 07:30 (36 flights) next.
- Departs 10:0953 flights15.9%
- Departs 11:2039 flights11.7%
- Departs 07:3036 flights10.8%
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 10:09 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and B6 544 runs 4 points worse at 80.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
B6 544 next to PBI to ISP
Every carrier on PBI to ISP combined arrived on time 73.9% of the time across 1,134 flights, so B6 544 is 6 points ahead of it. JetBlue flew 542 flights on the same city pair under all its flight numbers, including this one, and those ran 76.8% 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 544thin sample | 334 | 80.2% | 59 min | 0.90% | B+ |
| All JetBlue Airways on PBI–ISP | 542 | 76.8% | 65 min | 1.85% | B |
| All carriers on PBI–ISP | 1,134 | 73.9% | 60 min | 1.76% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 544 quarter by quarter
B6 544 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 71.0%, a swing of 22 points on roughly 67 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 flights93.3%
- Oct–Dec 202592 flights83.3%
- Jan–Mar 202690 flights72.4%
- Apr–Jun 202691 flights83.5%
- Jul–Sep 202631 flights71.0%
Scale runs 65% to 100%.
By weekday, B6 544 did best on Wednesday at 89.6% on time and worst on Monday at 68.1%. Each day rests on about 48 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 544 runs when it is late
B6 544 often beats the schedule: 114 of 329 completed flights, 35%, arrived 15 minutes or more early. The 65 late arrivals split 25 under half an hour, 15 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early114 flights34.7%
- Within 15 min150 flights45.6%
- 15–29 min late25 flights7.6%
- 30–59 min late15 flights4.6%
- 1–2 hours late15 flights4.6%
- 2+ hours late10 flights3.0%
Scale runs 0% to 100%.
Share of 329 completed flights by arrival against schedule.
15 of 71 late departures made up the time and arrived on time, 21% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for B6 544
The latest arrival of the period was on 15 December 2025, 4 hours 42 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 December 2025 | 4 hours 42 minutes | Late-arriving aircraft |
| 9 April 2026 | 3 hours 2 minutes | Late-arriving aircraft |
| 14 December 2025 | 2 hours 44 minutes | Late-arriving aircraft |
| 17 March 2026 | 2 hours 28 minutes | Late-arriving aircraft |
| 18 July 2026 | 2 hours 27 minutes | National Airspace System |
Delay causes
Why B6 544 runs late
Late-arriving aircraft accounts for 65% of the 3,831 delay minutes carriers reported here, and the remaining four split what is left.
- 65%Late-arriving aircraft
- 22%Carrier
- 12%National Airspace System
- 0%Security
65% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,831 reported delay minutes here, that single category outweighs weather by 65 to one. The split is drawn from 3,831 delay minutes reported on B6 544.
Cancellations sit at 0.90% against a national 1.89%, which is ordinary. Diversions add another 0.60%.
Connections and routes
What a delay on this flight costs
7.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 1,052 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 334 flights under B6 544 in the data flew PBI to ISP. 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. 334 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 544
For a booking, read B6 544 as 80.2% on time with 0.90% cancelled over 334 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- PBI to ISP, every carrier and departure
- ISP to PBI, the return direction
- Palm Beach International (PBI) 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.