Flight number record

B6 143

JetBlue Airways · Newark to West Palm Beach

Route: EWR → PBI
Departs: 06:00
Flights: 306
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 143, check with JetBlue Airways.

B6 143 sits in the middle of the pack with a C−. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 306 flights, with a median arrival 9 minutes early.

On time

74.3%

Arrivals under 15 minutes late, of 296 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

3.27%

National rate is 1.81%

1 hour+ late

8.8%

National rate is 8.1%

These figures cover 306 flights between July 2025 and June 2026. Beyond the headline rate, 8.8% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When B6 143 flies

B6 143 flies EWR to PBI without a single fixed slot. Its most common scheduled departure was 06:00, used on 71 of 306 flights, with 20:00 (63 flights) and 08:00 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0071 flights23.2%
Departs 20:0063 flights20.6%
Departs 08:0049 flights16.0%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 143 runs 15 points worse at 74.3%. 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 143 next to EWR to PBI

Every carrier on EWR to PBI combined arrived on time 77.1% of the time across 3,611 flights, so B6 143 is 3 points behind it. JetBlue flew 721 flights on the same city pair under all its flight numbers, including this one, and those ran 73.3% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 2 points.

B6 143 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 143thin sample	306	74.3%	74 min	3.27%	C−
All JetBlue Airways on EWR–PBI	721	73.3%	69 min	2.77%	C
All carriers on EWR–PBI	3,611	77.1%	69 min	2.52%	B
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 143 quarter by quarter

B6 143 did not run the same all year. Its best quarter was Apr–Jun 2026 at 82.2% on time and its weakest Jul–Sep 2025 at 62.3%, a swing of 20 points on roughly 77 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 202564 flights62.3%
Oct–Dec 202566 flights76.6%
Jan–Mar 202685 flights72.8%
Apr–Jun 202691 flights82.2%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, B6 143 did best on Tuesday at 86.0% on time and worst on Saturday at 63.6%. Each day rests on about 44 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 143 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 5,635 reported delay minutes.

Carrier
36%
National Airspace System
25%
Late-arriving aircraft
21%
Extreme weather
19%
Security
0%

Extreme weather accounts for 19% 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 3.0 times the usual weather exposure. The split is drawn from 5,635 delay minutes reported on B6 143.

Cancellations run at 3.27%, against 1.81% 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

8.8% 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 a little over an hour, which a normal layover absorbs.

The 1,024 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 306 flights under B6 143 in the data flew EWR 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. 306 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 143

For a booking, the cancellation rate is the figure to plan around on B6 143: 3.27% of its 306 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.

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