Flight number record
B6 1453
JetBlue Airways · Fort Lauderdale to San Juan
- Route
- FLL → SJU
- Departs
- 17:40
- Flights
- 309
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 1453, check with JetBlue Airways.
B6 1453 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 309 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.3%, so B6 1453 runs 7 points behind the country as a whole. Across a thousand flights that is about 69 extra late arrivals.
Key figures
On time
70.4%
Arrivals under 15 minutes late, of 304 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
1.62%
National rate is 1.89%
1 hour+ late
11.5%
National rate is 8.3%
These figures cover 309 flights between September 2025 and August 2026. Beyond the headline rate, 11.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When B6 1453 flies
B6 1453 flies FLL to SJU without a single fixed slot. Its most common scheduled departure was 17:40, used on 50 of 309 flights.
- Departs 17:4050 flights16.2%
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 17:40 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and B6 1453 runs 2 points better at 70.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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 1453 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 1453 is 4 points ahead of 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%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 1453thin sample | 309 | 70.4% | 64 min | 1.62% | C |
| 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 1453 quarter by quarter
B6 1453 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.7% on time and its weakest Jan–Mar 2026 at 48.0%, a swing of 39 points on roughly 62 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 flights86.7%
- Oct–Dec 202587 flights75.9%
- Jan–Mar 202652 flights48.0%
- Apr–Jun 202678 flights81.8%
- Jul–Sep 202662 flights58.3%
Scale runs 40% to 90%.
By weekday, B6 1453 did best on Tuesday at 81.8% on time and worst on Sunday at 55.8%. Each day rests on about 44 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 1453 runs when it is late
The 90 late arrivals split 25 under half an hour, 30 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early37 flights12.2%
- Within 15 min177 flights58.2%
- 15–29 min late25 flights8.2%
- 30–59 min late30 flights9.9%
- 1–2 hours late21 flights6.9%
- 2+ hours late14 flights4.6%
Scale runs 0% to 100%.
Share of 304 completed flights by arrival against schedule.
25 of 110 late departures made up the time and arrived on time, 23% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for B6 1453
The latest arrival of the period was on 15 March 2026, 3 hours 47 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 March 2026 | 3 hours 47 minutes | Late-arriving aircraft |
| 30 June 2026 | 3 hours 29 minutes | Late-arriving aircraft |
| 27 December 2025 | 3 hours 20 minutes | Late-arriving aircraft |
| 21 June 2026 | 3 hours 11 minutes | Late-arriving aircraft |
| 29 July 2026 | 3 hours 5 minutes | Late-arriving aircraft |
Delay causes
Why B6 1453 runs late
Late-arriving aircraft accounts for 58% of the 5,718 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Late-arriving aircraft
- 30%Carrier
- 7%National Airspace System
- 6%Extreme weather
58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,718 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 5,718 delay minutes reported on B6 1453.
Cancellations sit at 1.62% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
11.5% 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 309 flights under B6 1453 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. 309 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 1453
For a booking, read B6 1453 as 70.4% on time with 1.62% cancelled over 309 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- FLL to SJU, every carrier and departure
- SJU to FLL, the return direction
- JetBlue Airways 1553 on the same route58.9%
- 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.