Carrier route record
B6MCO→BOS
JetBlue Airways · Orlando to Boston
- Flights
- 2,495
- Period
- July 2025 to June 2026
- Share of route
- 54%
- Carriers
- 6
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on MCO to BOS draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 2,495 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,257 at 76.0% on time.
The national on-time rate over the same period is 77.6%, so JetBlue on MCO to BOS runs 10 points behind the country as a whole. Across a thousand flights that is about 103 extra late arrivals.
Key figures
On time
67.3%
Arrivals under 15 minutes late, of 2,415 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
3.13%
National rate is 1.81%
Whole route
70.5%
Every carrier on MCO to BOS, 4,611 flights
These figures cover 2,495 flights between July 2025 and June 2026. Beyond the headline rate, 14.5% 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.
Carrier by carrier
JetBlue against every carrier on MCO to BOS
JetBlue flew 2,495 of the 4,611 flights on MCO to BOS, most of the route. Its 67.3% on time is 3 points worse than the route as a whole, which runs 70.5%. Ranked by on-time rate it is number five of six carriers on the route, where the range runs from Southwest at 100.0% to American at 66.8%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 76.0% of the time; Spirit Airlines manages 69.3%. Sample sizes sit next to every figure, because a two-point gap across 519 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlinesthin sample | 3 | 100.0% | — | 0.00% | A+ |
| Frontier Airlinesthin sample | 124 | 90.3% | 68 min | 0.00% | A+ |
| Delta Air Lines | 1,257 | 76.0% | 74 min | 2.23% | B |
| Spirit Airlines | 519 | 69.3% | 62 min | 3.85% | C− |
| JetBlue Airways (this page) | 2,495 | 67.3% | 78 min | 3.13% | C− |
| American Airlinesthin sample | 213 | 66.8% | 71 min | 3.29% | C− |
Spirit Airlines cancels 3.9% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
JetBlue flight numbers on MCO to BOS
Departure window
When JetBlue runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 39 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am438 flights91.4%
- 8am–11am488 flights83.0%
- 11am–2pm422 flights62.6%
- 2pm–5pm399 flights53.4%
- 5pm–8pm542 flights52.7%
- 8pm–5am206 flights53.0%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 52.7% on time, against 91.4% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 542 flights scheduled in it.
Across the year
JetBlue on MCO to BOS through the year
July is the worst month at 55.1% on time, 26 points below May, the best at 81.6%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. April was the busiest month here, with 275 flights.
Across the week, Friday is the strongest day at 70.6% on time and Sunday the weakest at 61.7%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why JetBlue runs late on this route
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 62,000 reported delay minutes.
- 41%Late-arriving aircraft
- 34%National Airspace System
- 20%Carrier
- 4%Extreme weather
- 0%Security
41% 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 62,000 reported delay minutes here, that single category outweighs weather by 10 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 61,708 reported delay minutes.
34% 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 21,000 minutes out of 62,000, against a national NAS share of 21%.
Cancellations run at 3.13%, against 1.81% nationally. That is about 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 stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 14.5% 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 1,121 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.
The return leg runs 67.9% on time across 2,493 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 2,495 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking JetBlue on MCO to BOS
Put together: the delay figures matter less here than the 3.13% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 2,415 completed flights over 12 months sit behind that.
Related
Where to go next
- MCO to BOS, every carrier
- JetBlue on BOS to MCO, the return leg
- Frontier Airlines on MCO to BOS90.3%
- Delta Air Lines on MCO to BOS76.0%
- Spirit Airlines on MCO to BOS69.3%
- American Airlines on MCO to BOS66.8%
- JetBlue Airways network-wide record
- Orlando International (MCO) delay statistics
- Boston Logan International (BOS) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.