Flight number record

B6 165

JetBlue Airways · Boston to Fort Myers

Route: BOS → RSW
Departs: 06:45
Flights: 348
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 165, check with JetBlue Airways.

B6 165 sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 348 flights, with a median arrival 9 minutes early.

On time

75.8%

Arrivals under 15 minutes late, of 339 completed flights

Avg delay

79 min

Across delayed arrivals only, not all flights

Cancelled

1.72%

National rate is 1.81%

1 hour+ late

9.7%

National rate is 8.1%

These figures cover 348 flights between July 2025 and June 2026. Beyond the headline rate, 9.7% 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 165 flies

B6 165 flies BOS to RSW without a single fixed slot. Its most common scheduled departure was 06:45, used on 58 of 348 flights, with 07:00 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:4558 flights16.7%
Departs 07:0055 flights15.8%

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 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 14 points worse at 75.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

B6 165 next to BOS to RSW

Every carrier on BOS to RSW combined arrived on time 70.5% of the time across 2,253 flights, so B6 165 is 5 points ahead of it. JetBlue flew 1,596 flights on the same city pair under all its flight numbers, including this one, and those ran 69.4% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight beats by 3 points.

B6 165 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 165thin sample	348	75.8%	79 min	1.72%	B
All JetBlue Airways on BOS–RSW	1,596	69.4%	67 min	2.63%	C
All carriers on BOS–RSW	2,253	70.5%	66 min	2.62%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 165 quarter by quarter

B6 165 did not run the same all year. Its best quarter was Jul–Sep 2025 at 97.5% on time and its weakest Jan–Mar 2026 at 52.9%, a swing of 45 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 202581 flights97.5%
Oct–Dec 202588 flights70.9%
Jan–Mar 202690 flights52.9%
Apr–Jun 202689 flights83.9%

Scale runs 45% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, B6 165 did best on Wednesday at 83.3% on time and worst on Sunday at 66.7%. Each day rests on about 50 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 165 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 6,446 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
53%
Carrier
23%
National Airspace System
18%
Extreme weather
6%

53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 6,446 reported delay minutes here, that single category outweighs weather by 9 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 6,446 delay minutes reported on B6 165.

Cancellations sit at 1.72% against a national 1.81%, which is ordinary. Diversions add another 0.86%.

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. 9.7% 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 1,249 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. 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 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, read B6 165 as 75.8% on time with 1.72% cancelled over 348 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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