Flight number record
B6 165
JetBlue Airways · Boston to Fort Myers
- Route
- BOS → RSW
- Departs
- 06:45
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s B6 165, check with JetBlue Airways.
B6 165 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 348 flights, with a median arrival 9 minutes early.
Key figures
On time
74.0%
Arrivals under 15 minutes late, of 335 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
2.87%
National rate is 1.89%
1 hour+ late
10.4%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When B6 165 flies
B6 165 flies BOS to RSW without a single fixed slot. Its most common scheduled departure was 06:45, used on 116 of 348 flights.
- Departs 06:45116 flights33.3%
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 06:45 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 165 runs 15 points worse at 74.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
B6 165 next to BOS to RSW
Every carrier on BOS to RSW combined arrived on time 70.4% of the time across 2,167 flights, so B6 165 is 4 points ahead of it. JetBlue flew 1,543 flights on the same city pair under all its flight numbers, including this one, and those ran 68.6% on time. Across its whole network JetBlue Airways managed 71.3%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 165thin sample | 348 | 74.0% | 79 min | 2.87% | C |
| All JetBlue Airways on BOS–RSW | 1,543 | 68.6% | 68 min | 2.92% | C |
| All carriers on BOS–RSW | 2,167 | 70.4% | 66 min | 2.77% | C |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | C− |
Across the year
B6 165 quarter by quarter
B6 165 did not run the same all year. Its best quarter was Jul–Sep 2026 at 87.5% on time and its weakest Jan–Mar 2026 at 52.9%, a swing of 35 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 202519 flights—
- Oct–Dec 202588 flights70.9%
- Jan–Mar 202690 flights52.9%
- Apr–Jun 202689 flights83.9%
- Jul–Sep 202662 flights87.5%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, B6 165 ranged from 67.3% on Sunday to 77.3% on Tuesday. With about 50 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late B6 165 runs when it is late
B6 165 often beats the schedule: 125 of 335 completed flights, 37%, arrived 15 minutes or more early. The 87 late arrivals split 23 under half an hour, 29 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early125 flights37.3%
- Within 15 min123 flights36.7%
- 15–29 min late23 flights6.9%
- 30–59 min late29 flights8.7%
- 1–2 hours late15 flights4.5%
- 2+ hours late20 flights6.0%
Scale runs 0% to 100%.
Share of 335 completed flights by arrival against schedule.
15 of 83 late departures made up the time and arrived on time, 18% of them. In the other direction, 19 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 RSW.
The worst days
Worst days for B6 165
The latest arrival of the period was on 26 January 2026, 7 hours 7 minutes behind schedule; most of its delay minutes were filed as extreme weather. On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 January 2026 | 7 hours 7 minutes | Extreme weather |
| 18 January 2026 | 4 hours 1 minute | Late-arriving aircraft |
| 11 December 2025 | 3 hours 59 minutes | Late-arriving aircraft |
| 27 February 2026 | 3 hours 39 minutes | Late-arriving aircraft |
| 3 July 2026 | 3 hours 35 minutes | Late-arriving aircraft |
Delay causes
Why B6 165 runs late
Late-arriving aircraft accounts for 52% of the 6,837 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Late-arriving aircraft
- 24%Carrier
- 18%National Airspace System
- 5%Extreme weather
52% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,837 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 6,837 delay minutes reported on B6 165.
Cancellations run at 2.87%, against 1.89% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
10.4% 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 1,249 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 348 flights under B6 165 in the data flew BOS to RSW. 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. 348 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 165
For a booking, the cancellation rate is the figure to plan around on B6 165: 2.87% of its 348 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- BOS to RSW, every carrier and departure
- RSW to BOS, the return direction
- Delta Air Lines 2474 on the same route87.6%
- JetBlue Airways 2065 on the same route67.1%
- Boston Logan International (BOS) delay statistics
- Southwest Florida International (RSW) 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.