Flight number record

B6 1143

JetBlue Airways · Manchester to Orlando

Route: MHT → MCO
Departs: 07:00
Flights: 284
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 1143, check with JetBlue Airways.

B6 1143 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 284 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.6%, so B6 1143 runs 5 points behind the country as a whole. Across a thousand flights that is about 54 extra late arrivals.

On time

72.2%

Arrivals under 15 minutes late, of 277 completed flights

Avg delay

73 min

Across delayed arrivals only, not all flights

Cancelled

1.76%

National rate is 1.81%

1 hour+ late

12.6%

National rate is 8.1%

These figures cover 284 flights between July 2025 and June 2026. Beyond the headline rate, 12.6% 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 1143 flies

B6 1143 flies MHT to MCO without a single fixed slot. Its most common scheduled departure was 07:00, used on 97 of 284 flights, with 14:00 (33 flights) and 16:03 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:0097 flights34.2%
Departs 14:0033 flights11.6%
Departs 16:0331 flights10.9%

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 1143 runs 17 points worse at 72.2%. 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 1143 next to MHT to MCO

Every carrier on MHT to MCO combined arrived on time 77.6% of the time across 868 flights, so B6 1143 is 5 points behind it. Across its whole network JetBlue Airways managed 72.7%, close to this flight's figure.

B6 1143 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 1143thin sample	284	72.2%	73 min	1.76%	C
All JetBlue Airways on MHT–MCO	366	76.3%	69 min	1.64%	B
All carriers on MHT–MCO	868	77.6%	63 min	1.04%	B
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 1143 quarter by quarter

B6 1143 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.0% on time and its weakest Jul–Sep 2025 at 56.7%, a swing of 28 points on roughly 71 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 202592 flights56.7%
Oct–Dec 202592 flights80.4%
Jan–Mar 202659 flights74.5%
Apr–Jun 202641 flights85.0%

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, B6 1143 did best on Wednesday at 80.0% on time and worst on Sunday at 59.0%. Each day rests on about 41 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 1143 runs late

One category carries most of the weight here. National Airspace System accounts for 52% of the 5,589 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.

National Airspace System
52%
Late-arriving aircraft
35%
Carrier
12%
Extreme weather
2%

35% 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 5,589 reported delay minutes here, that single category outweighs weather by 22 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 5,589 delay minutes reported on B6 1143.

Cancellations sit at 1.76% against a national 1.81%, which is ordinary. Diversions add another 0.70%.

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. 12.6% 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 1,142 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 284 flights under B6 1143 in the data flew MHT 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. 284 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 1143

For a booking, B6 1143 is a flight to put a long connection behind. 12.6% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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