Carrier route record
B6JAX→BOS
JetBlue Airways · Jacksonville to Boston
- Flights
- 658
- Period
- July 2025 to June 2026
- Share of route
- 41%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on JAX to BOS sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 658 flights, with a median arrival 4 minutes early.
The national on-time rate over the same period is 77.6%, so JetBlue on JAX to BOS runs 9 points behind the country as a whole. Across a thousand flights that is about 89 extra late arrivals.
Key figures
On time
68.7%
Arrivals under 15 minutes late, of 638 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
3.04%
National rate is 1.81%
Whole route
74.4%
Every carrier on JAX to BOS, 1,609 flights
These figures cover 658 flights between July 2025 and June 2026. Beyond the headline rate, 13.6% 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.
Carrier by carrier
JetBlue against every carrier on JAX to BOS
JetBlue flew 658 of the 1,609 flights on JAX to BOS, about 41% of it. Its 68.7% on time is 6 points worse than the route as a whole, which runs 74.4%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Delta at 85.2% to JetBlue at 68.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 56 | 85.2% | 71 min | 3.57% | A− |
| Republic Airways | 895 | 77.9% | 88 min | 1.68% | B |
| JetBlue Airways (this page) | 658 | 68.7% | 71 min | 3.04% | C− |
Flight by flight
JetBlue flight numbers on JAX 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 40 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am37 flights97.3%
- 8am–11am144 flights86.6%
- 11am–2pm219 flights62.4%
- 2pm–5pm—
- 5pm–8pm130 flights61.7%
- 8pm–5am128 flights57.0%
Scale runs 50% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 57.0% on time, against 97.3% 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 11am–2pm window is the busiest, with 219 flights scheduled in it.
Across the year
JetBlue on JAX to BOS through the year
May is the best month on the calendar at 89.5% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. May was the busiest month here, with 76 flights.
Across the week, Saturday is the strongest day at 80.7% on time and Sunday the weakest at 60.0%. 21 points is a smaller lever than departure hour, but it is free.
Delay causes
Why JetBlue runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 58% of the 14,000 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.
- 58%Late-arriving aircraft
- 29%National Airspace System
- 13%Carrier
- 0%Extreme weather
58% 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 14,000 reported delay minutes here, that single category outweighs weather by 58 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 14,212 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 97.3% on time here.
Cancellations run at 3.04%, against 1.81% nationally. That is roughly 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. 13.6% 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 1,011 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 is a different operation and performs like one: it runs 75.9% on time across 658 flights, 7 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 7 points of difference.
One caution: this is a thin sample. 658 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 JetBlue on JAX to BOS
Put together: the delay figures matter less here than the 3.04% 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. 638 completed flights over 12 months sit behind that.
Related
Where to go next
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.