Flight number record

B6 553

JetBlue Airways · Fort Lauderdale to San Juan

Route: FLL → SJU
Departs: 06:00
Flights: 304
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 553, check with JetBlue Airways.

B6 553 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 304 flights, with a median arrival 7 minutes early.

Set against the rest of the country, B6 553's record is 9 points better than the US average of 77.6%. That gap is worth roughly 87 fewer late arrivals for every thousand flights.

On time

86.3%

Arrivals under 15 minutes late, of 300 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

1.32%

National rate is 1.81%

1 hour+ late

4.3%

National rate is 8.1%

These figures cover 304 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 553 flies

B6 553 flies FLL to SJU without a single fixed slot. Its most common scheduled departure was 06:00, used on 42 of 304 flights, with 06:40 (37 flights) and 08:25 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0042 flights13.8%
Departs 06:4037 flights12.2%
Departs 08:2535 flights11.5%

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 553 runs 3 points worse at 86.3%. 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 553 next to FLL to SJU

Every carrier on FLL to SJU combined arrived on time 68.0% of the time across 2,344 flights, so B6 553 is 18 points ahead of it. JetBlue flew 1,646 flights on the same city pair under all its flight numbers, including this one, and those ran 71.0% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 14 points.

B6 553 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 553thin sample	304	86.3%	51 min	1.32%	A
All JetBlue Airways on FLL–SJU	1,646	71.0%	58 min	1.22%	C
All carriers on FLL–SJU	2,344	68.0%	62 min	1.32%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 553 quarter by quarter

B6 553 did not run the same all year. Its best quarter was Oct–Dec 2025 at 92.2% on time and its weakest Apr–Jun 2026 at 80.2%, a swing of 12 points on roughly 76 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 flights84.4%
Oct–Dec 202565 flights92.2%
Jan–Mar 202688 flights89.5%
Apr–Jun 202687 flights80.2%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, B6 553 did best on Thursday at 93.2% on time and worst on Sunday at 72.7%. Each day rests on about 43 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 553 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 2,106 reported delay minutes.

Late-arriving aircraft
41%
Carrier
34%
Extreme weather
14%
National Airspace System
10%

Extreme weather accounts for 14% 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 2.3 times the usual weather exposure. The split is drawn from 2,106 delay minutes reported on B6 553.

Cancellations sit at 1.32% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.3% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 1,046 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 304 flights under B6 553 in the data flew FLL to SJU. 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. 304 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 553

For a booking, B6 553 has one of the better records a US domestic flight can show: 86.3% on time and 1.32% cancelled. That is a base rate, not a promise about any single 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