Flight number record

B6 2251

JetBlue Airways · Boston to Orlando

Route: BOS → MCO
Departs: 07:00
Flights: 342
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 2251, check with JetBlue Airways.

B6 2251 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 342 flights, with a median arrival 3 minutes early.

The national on-time rate over the same period is 77.6%, so B6 2251 runs 6 points behind the country as a whole. Across a thousand flights that is about 56 extra late arrivals.

On time

72.0%

Arrivals under 15 minutes late, of 322 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

3.80%

National rate is 1.81%

1 hour+ late

8.7%

National rate is 8.1%

These figures cover 342 flights between July 2025 and June 2026. Beyond the headline rate, 8.7% 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 2251 flies

B6 2251 flies BOS to MCO without a single fixed slot. Its most common scheduled departure was 07:00, used on 73 of 342 flights, with 18:09 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:0073 flights21.3%
Departs 18:0935 flights10.2%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and B6 2251 runs 17 points worse at 72.0%. 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 2251 next to BOS to MCO

Every carrier on BOS to MCO combined arrived on time 70.1% of the time across 4,606 flights, so B6 2251 is 2 points ahead of it. JetBlue flew 2,493 flights on the same city pair under all its flight numbers, including this one, and those ran 67.9% on time. Across its whole network JetBlue Airways managed 72.7%, close to this flight's figure.

B6 2251 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 2251thin sample	342	72.0%	74 min	3.80%	C−
All JetBlue Airways on BOS–MCO	2,493	67.9%	73 min	2.89%	C
All carriers on BOS–MCO	4,606	70.1%	77 min	2.74%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 2251 quarter by quarter

B6 2251 did not run the same all year. Its best quarter was Jan–Mar 2026 at 75.6% on time and its weakest Jul–Sep 2025 at 61.6%, a swing of 14 points on roughly 86 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 202578 flights61.6%
Oct–Dec 202583 flights74.4%
Jan–Mar 202690 flights75.6%
Apr–Jun 202691 flights75.3%

Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, B6 2251 did best on Wednesday at 87.0% on time and worst on Saturday at 59.0%. Each day rests on about 49 flights, so a gap of 28 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 2251 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 6,657 reported delay minutes.

Late-arriving aircraft
39%
National Airspace System
38%
Carrier
21%
Extreme weather
1%
Security
0%

39% 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 6,657 reported delay minutes here, that single category outweighs weather by 39 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 6,657 delay minutes reported on B6 2251.

Cancellations run at 3.80%, against 1.81% nationally. That is about one flight in 25 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

8.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 1,121 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 342 flights under B6 2251 in the data flew BOS to MCO. 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. 342 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 2251

For a booking, the cancellation rate is the figure to plan around on B6 2251: 3.80% of its 342 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.

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