Flight number record
B6 1553
JetBlue Airways · Fort Lauderdale to San Juan
- Route
- FLL → SJU
- Departs
- 11:10
- Flights
- 347
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 8 minutes late.
The national on-time rate over the same period is 77.3%, so B6 1553 runs 18 points behind the country as a whole. Across a thousand flights that is about 184 extra late arrivals.
Key figures
On time
58.9%
Arrivals under 15 minutes late, of 343 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
1.15%
National rate is 1.89%
1 hour+ late
11.4%
National rate is 8.3%
These figures cover 347 flights between September 2025 and August 2026. Beyond the headline rate, 11.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 10:10 (46 flights) and 11:05 (44 flights) next.
- Departs 11:1082 flights23.6%
- Departs 10:1046 flights13.3%
- Departs 11:0544 flights12.7%
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 11:10 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and B6 1553 runs 19 points worse at 58.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
B6 1553 next to FLL to SJU
Every carrier on FLL to SJU combined arrived on time 66.8% of the time across 2,358 flights, so B6 1553 is 8 points behind it. JetBlue flew 1,718 flights on the same city pair under all its flight numbers, including this one, and those ran 69.3% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight trails by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1553thin sample | 347 | 58.9% | 53 min | 1.15% | D |
| All JetBlue Airways on FLL–SJU | 1,718 | 69.3% | 60 min | 1.57% | C |
| All carriers on FLL–SJU | 2,358 | 66.8% | 63 min | 1.57% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | 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 80.0% on time and its weakest Jan–Mar 2026 at 46.0%, a swing of 34 points on roughly 69 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 flights80.0%
- Oct–Dec 202588 flights52.3%
- Jan–Mar 202689 flights46.0%
- Apr–Jun 202678 flights64.1%
- Jul–Sep 202662 flights70.0%
Scale runs 40% to 85%.
By weekday, B6 1553 did best on Wednesday at 71.4% on time and worst on Saturday at 44.7%. Each day rests on about 50 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 1553 runs when it is late
The 141 late arrivals split 63 under half an hour, 39 between 30 and 60 minutes, and 39 an hour or more.
- 15+ min early26 flights7.6%
- Within 15 min176 flights51.3%
- 15–29 min late63 flights18.4%
- 30–59 min late39 flights11.4%
- 1–2 hours late27 flights7.9%
- 2+ hours late12 flights3.5%
Scale runs 0% to 100%.
Share of 343 completed flights by arrival against schedule.
24 of 136 late departures made up the time and arrived on time, 18% of them. In the other direction, 29 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 SJU.
The worst days
Worst days for B6 1553
The latest arrival of the period was on 30 December 2025, 4 hours 15 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 December 2025 | 4 hours 15 minutes | Late-arriving aircraft |
| 8 November 2025 | 3 hours 54 minutes | Carrier |
| 29 August 2026 | 3 hours 51 minutes | Late-arriving aircraft |
| 25 May 2026 | 3 hours 48 minutes | Late-arriving aircraft |
| 15 December 2025 | 3 hours 39 minutes | Late-arriving aircraft |
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 7,472 reported delay minutes.
- 38%Carrier
- 36%Late-arriving aircraft
- 23%National Airspace System
- 2%Extreme weather
- 0%Security
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,472 reported delay minutes here, that single category outweighs weather by 20 to one. The split is drawn from 7,472 delay minutes reported on B6 1553.
Cancellations sit at 1.15% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
11.4% 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 1,046 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.
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: 8 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.
Related
Where to go next
- FLL to SJU, every carrier and departure
- SJU to FLL, the return direction
- JetBlue Airways 1453 on the same route70.4%
- JetBlue Airways 553 on the same route83.3%
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Luis Munoz Marin International (SJU) 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.