Flight profile · JetBlue
B6690
Fort Lauderdale (FLL) to Boston (BOS) · scheduled 6:00 AM – 9:46 AM
How B6690 performs
674 operations, September 2023 – July 2026.
B6690 arrived on time 87.1% of the time, against 68.5% for all FLL → BOS flights, so this departure is 18.6 percentage points better than the route as a whole. Against JetBlue’s own flights on this route it is 19.4 points better.
Source: US DOT Bureau of Transportation Statistics · 674 operations, September 2023 – July 2026 · If B6690 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How B6690 compares to other flight numbers, not just to itself.
This flight runs unusually far ahead of the carrier's own average on this route, better than 100% of 11,589 comparable flight numbers.
87.1% on time for this specific departure, against 67.7% for the same carrier's other flights on this route.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where B6690 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| B6690 | 87.1% | 0.30% | -9 min | 4.0% | 674 |
| JetBlue on FLL → BOS | 67.7% | 2.09% | -1 min | 14.6% | 5,223 |
| All FLL → BOS flights | 68.5% | 2.11% | -2 min | 13.6% | 9,992 |
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026
Why B6690 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for B6690 on FLL → BOS. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies B6690 comes in late, and what that does to the departure.
B6690 is usually the aircraft’s first flight of the day: the schedule gives it a median of 7.7 hours on the ground at FLL, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, B6690 pushed back an average of 8 minutes late; when it came in on time or early, an average of 1 minute late.
Each departure is matched to the flight the same aircraft flew into FLL just before it, using the tail number in the DOT file, 506 of 672 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| B6690 | 35% | 17% | 9% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often B6690’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often B6690 left 15 or more minutes late is higher than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
From pushback to gate
When it leaves FLL late, does that still matter by the time it reaches BOS?
B6690 pushes back an average of 3.7 minutes late and reaches the gate at BOS an average of 2.4 minutes early. The 6.1 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 17.3 minutes on the taxiways at FLL, 2.2 minutes longer than a typical FLL departure in the same hour.
On arrival at BOS, B6690 spends 7.7 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.2 minutes shorter than a typical BOS arrival (9.0 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached BOS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 21,980 departures from FLL scheduled in the clock hour B6690 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at BOS (440,886 flights), not just B6690’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026
The hour it leaves FLL
Part of any flight’s record belongs to the clock rather than to the flight. B6690 has one departure time, so this is what that time is worth.
On-time arrival rate. 21,980 departures from FLL are scheduled in the 6 AM–7 AM hour over the period, against 278,691 across the whole day.
B6690 is scheduled out of FLL at 6:00 AM, in the 6 AM–7 AM bank. Departures from FLL in that hour arrive on time 91.3% of the time against 72.6% across the airport’s whole day — the slot alone is worth 18.7 points better before anything about this particular flight is considered.
The two airport figures cover every departure from FLL to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026 · Hours below 120 departures are not scored.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
20 min late
against a median of 9 min early
Percentiles over 674 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| B6690 this flight | JetBlue | 87.1% | 9 min early | 674 |
| B670 | JetBlue | 69.1% | 3 min early | 943 |
| DL1401 | Delta Air Lines | 68.8% | 1 min early | 633 |
| B6170 | JetBlue | 52.2% | 11 min late | 726 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. B6690 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 674 records of B6690 operating FLL → BOS, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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