Flight number record
B6 2251
JetBlue Airways · Boston to Orlando
- Route
- BOS → MCO
- Departs
- 07:00
- Flights
- 342
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. The late ones land about 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 77.3%, so B6 2251 runs 6 points behind the country as a whole. Across a thousand flights that is about 55 extra late arrivals.
Key figures
On time
71.8%
Arrivals under 15 minutes late, of 319 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
5.26%
National rate is 1.89%
1 hour+ late
8.2%
National rate is 8.3%
These figures cover 342 flights between September 2025 and August 2026. Beyond the headline rate, 8.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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.
- Departs 07:0073 flights21.3%
- Departs 18:0935 flights10.2%
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 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 18 points worse at 71.8%. 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 2251 next to BOS to MCO
Every carrier on BOS to MCO combined arrived on time 69.5% of the time across 4,605 flights, so B6 2251 is 2 points ahead of it. JetBlue flew 2,520 flights on the same city pair under all its flight numbers, including this one, and those ran 66.6% on time. Across its whole network JetBlue Airways managed 71.3%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| B6 2251thin sample | 342 | 71.8% | 62 min | 5.26% | C− |
| All JetBlue Airways on BOS–MCO | 2,520 | 66.6% | 74 min | 3.61% | C− |
| All carriers on BOS–MCO | 4,605 | 69.5% | 77 min | 3.17% | C− |
| JetBlue Airways, whole network | 240,615 | 71.3% | 77 min | 3.56% | 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 2026 at 58.2%, a swing of 17 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 202516 flights—
- Oct–Dec 202583 flights74.4%
- Jan–Mar 202690 flights75.6%
- Apr–Jun 202691 flights75.3%
- Jul–Sep 202662 flights58.2%
Scale runs 50% 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 Sunday at 62.5%. Each day rests on about 49 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late B6 2251 runs when it is late
B6 2251 often beats the schedule: 82 of 319 completed flights, 26%, arrived 15 minutes or more early. The 90 late arrivals split 35 under half an hour, 29 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early82 flights25.7%
- Within 15 min147 flights46.1%
- 15–29 min late35 flights11.0%
- 30–59 min late29 flights9.1%
- 1–2 hours late13 flights4.1%
- 2+ hours late13 flights4.1%
Scale runs 0% to 100%.
Share of 319 completed flights by arrival against schedule.
17 of 72 late departures made up the time and arrived on time, 24% of them. In the other direction, 35 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 MCO.
The worst days
Worst days for B6 2251
The latest arrival of the period was on 17 August 2026, 6 hours 17 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across August, December, June and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 August 2026 | 6 hours 17 minutes | Carrier |
| 15 December 2025 | 4 hours 27 minutes | Carrier |
| 22 June 2026 | 4 hours 2 minutes | Late-arriving aircraft |
| 17 March 2026 | 3 hours 52 minutes | Late-arriving aircraft |
| 6 August 2026 | 3 hours 46 minutes | National Airspace System |
Delay causes
Why B6 2251 runs late
National Airspace System accounts for 47% of the 5,593 delay minutes carriers reported here, and the remaining four split what is left.
- 47%National Airspace System
- 29%Carrier
- 22%Late-arriving aircraft
- 1%Extreme weather
47% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,649 minutes out of 5,593, against a national NAS share of 21%. The split is drawn from 5,593 delay minutes reported on B6 2251.
Cancellations run at 5.26%, against 1.89% nationally. That is about one flight in twenty 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
8.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 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.
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: 5.26% of its 342 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- BOS to MCO, every carrier and departure
- MCO to BOS, the return direction
- JetBlue Airways 451 on the same route52.2%
- Delta Air Lines 1513 on the same route65.8%
- JetBlue Airways 551 on the same route63.1%
- Delta Air Lines 1580 on the same route90.7%
- Boston Logan International (BOS) delay statistics
- Orlando International (MCO) 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
- What a cancellation rate actually tells you (and what it hides)
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.