Flight number record

B6 1553

JetBlue Airways · Fort Lauderdale to San Juan

Route: FLL → SJU
Departs: 11:10
Flights: 347
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 1553, check with JetBlue Airways.

B6 1553 draws a D+. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is roughly 55 minutes behind schedule. Build slack into anything you connect to. That rests on 347 flights, with a median arrival 9 minutes late.

The national on-time rate over the same period is 77.6%, so B6 1553 runs 19 points behind the country as a whole. Across a thousand flights that is about 189 extra late arrivals.

On time

58.7%

Arrivals under 15 minutes late, of 344 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

0.86%

National rate is 1.81%

1 hour+ late

11.3%

National rate is 8.1%

These figures cover 347 flights between July 2025 and June 2026. Beyond the headline rate, 11.3% 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 1553 flies

B6 1553 flies FLL to SJU without a single fixed slot. Its most common scheduled departure was 11:10, used on 82 of 347 flights, with 12:15 (51 flights) and 11:00 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:1082 flights23.6%
Departs 12:1551 flights14.7%
Departs 11:0040 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 11:10 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and B6 1553 runs 20 points worse at 58.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

B6 1553 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 1553 is 9 points behind 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 trails by 14 points.

B6 1553 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 1553thin sample	347	58.7%	53 min	0.86%	D+
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 1553 quarter by quarter

B6 1553 did not run the same all year. Its best quarter was Jul–Sep 2025 at 72.5% on time and its weakest Jan–Mar 2026 at 46.0%, a swing of 27 points on roughly 87 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 flights72.5%
Oct–Dec 202588 flights52.3%
Jan–Mar 202689 flights46.0%
Apr–Jun 202678 flights64.1%

Scale runs 40% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, B6 1553 did best on Wednesday at 77.1% on time and worst on Saturday at 43.8%. Each day rests on about 50 flights, so a gap of 33 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 1553 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 7,584 reported delay minutes.

Carrier
41%
Late-arriving aircraft
31%
National Airspace System
26%
Extreme weather
2%
Security
0%

The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,106 of the 7,584 delay minutes reported here. The split is drawn from 7,584 delay minutes reported on B6 1553.

Cancellations are rare at 0.86%, 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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 347 flights under B6 1553 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. 347 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 1553

For a booking, B6 1553 is one of the weaker ways to fly FLL to SJU: 9 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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