Flight number record

B6 544

JetBlue Airways · West Palm Beach to Islip

Route: PBI → ISP
Departs: 10:09
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 544, check with JetBlue Airways.

B6 544 lands a B+, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 7 minutes early.

On time

80.0%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

1 hour+ late

7.8%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 7 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.

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 365 flights, with 11:20 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:0953 flights14.5%
Departs 11:2039 flights10.7%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 84.1%, and B6 544 runs 4 points worse at 80.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

B6 544 next to PBI to ISP

Every carrier on PBI to ISP combined arrived on time 73.6% of the time across 1,223 flights, so B6 544 is 6 points ahead of it. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 7 points.

B6 544 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 544	365	80.0%	60 min	0.82%	B+
All JetBlue Airways on PBI–ISP	542	77.5%	65 min	1.85%	B
All carriers on PBI–ISP	1,223	73.6%	62 min	1.64%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 544 quarter by quarter

B6 544 did not run the same all year. Its best quarter was Apr–Jun 2026 at 83.5% on time and its weakest Jan–Mar 2026 at 72.4%, a swing of 11 points on roughly 91 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 202592 flights80.4%
Oct–Dec 202592 flights83.3%
Jan–Mar 202690 flights72.4%
Apr–Jun 202691 flights83.5%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, B6 544 did best on Friday at 86.5% on time and worst on Sunday at 70.0%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 544 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 65% of the 4,284 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
65%
Carrier
23%
National Airspace System
11%
Security
0%
Extreme weather
0%

65% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 4,284 reported delay minutes here, that single category outweighs weather by 65 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 4,284 delay minutes reported on B6 544.

Cancellations are rare at 0.82%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

7.8% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 365 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. 365 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 80.0% on time with 0.82% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures