Flight number record
B6 545
JetBlue Airways · Islip to West Palm Beach
- Route
- ISP → PBI
- Departs
- 13:55
- Flights
- 326
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 545, check with JetBlue Airways.
B6 545 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 326 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so B6 545 runs 9 points behind the country as a whole. Across a thousand flights that is about 89 extra late arrivals.
Key figures
On time
68.4%
Arrivals under 15 minutes late, of 316 completed flights
Avg delay
97 min
Across delayed arrivals only, not all flights
Cancelled
2.15%
National rate is 1.89%
1 hour+ late
12.3%
National rate is 8.3%
These figures cover 326 flights between September 2025 and August 2026. Beyond the headline rate, 12.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 545 flies
B6 545 flies ISP to PBI without a single fixed slot. Its most common scheduled departure was 13:55, used on 53 of 326 flights, with 15:00 (41 flights) next.
- Departs 13:5553 flights16.3%
- Departs 15:0041 flights12.6%
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 13:55 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and B6 545 runs 10 points worse at 68.4%. 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 545 next to ISP to PBI
Every carrier on ISP to PBI combined arrived on time 72.1% of the time across 1,133 flights, so B6 545 is 4 points behind it. JetBlue flew 540 flights on the same city pair under all its flight numbers, including this one, and those ran 73.7% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 545thin sample | 326 | 68.4% | 97 min | 2.15% | C |
| All JetBlue Airways on ISP–PBI | 540 | 73.7% | 95 min | 2.59% | C |
| All carriers on ISP–PBI | 1,133 | 72.1% | 72 min | 2.29% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 545 quarter by quarter
B6 545 did not run the same all year. Its best quarter was Apr–Jun 2026 at 77.0% on time and its weakest Jan–Mar 2026 at 55.6%, a swing of 21 points on roughly 82 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 flights76.7%
- Oct–Dec 202592 flights70.8%
- Jan–Mar 202686 flights55.6%
- Apr–Jun 202688 flights77.0%
- Jul–Sep 202630 flights—
Scale runs 45% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, B6 545 did best on Monday at 73.9% on time and worst on Saturday at 57.1%. Each day rests on about 47 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 545 runs when it is late
B6 545 often beats the schedule: 85 of 316 completed flights, 27%, arrived 15 minutes or more early. The 100 late arrivals split 35 under half an hour, 26 between 30 and 60 minutes, and 39 an hour or more.
- 15+ min early85 flights26.9%
- Within 15 min131 flights41.5%
- 15–29 min late35 flights11.1%
- 30–59 min late26 flights8.2%
- 1–2 hours late19 flights6.0%
- 2+ hours late20 flights6.3%
Scale runs 0% to 100%.
Share of 316 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 89 departures that left 15 minutes late or more, only 10 made it up before arrival. In the other direction, 21 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at PBI.
The worst days
Worst days for B6 545
The latest arrival of the period was on 18 July 2026, 25 hours 57 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 July 2026 | 25 hours 57 minutes | Extreme weather |
| 26 June 2026 | 17 hours 52 minutes | Carrier |
| 15 December 2025 | 6 hours 15 minutes | Late-arriving aircraft |
| 28 May 2026 | 5 hours 51 minutes | Late-arriving aircraft |
| 20 March 2026 | 5 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why B6 545 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 9,716 reported delay minutes.
- 41%Late-arriving aircraft
- 26%Carrier
- 19%National Airspace System
- 15%Extreme weather
Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.4 times the usual weather exposure. The split is drawn from 9,716 delay minutes reported on B6 545.
Cancellations sit at 2.15% against a national 1.89%, which is ordinary. Diversions add another 0.92%.
Connections and routes
What a delay on this flight costs
12.3% 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.
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 326 flights under B6 545 in the data flew ISP to PBI. 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. 326 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 545
For a booking, B6 545 is a flight to put a long connection behind. 12.3% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- ISP to PBI, every carrier and departure
- PBI to ISP, 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.