Carrier route record
B6JAX→BOS
JetBlue Airways · Jacksonville to Boston
- Flights
- 665
- Period
- September 2025 to August 2026
- Share of route
- 41%
- Carriers
- 3
Historical statistics for September 2025 to August 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 77.3%. The late ones land a little over an hour behind schedule. That rests on 665 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so JetBlue on JAX to BOS runs 9 points behind the country as a whole. Across a thousand flights that is about 91 extra late arrivals.
Key figures
On time
68.2%
Arrivals under 15 minutes late, of 641 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
3.61%
National rate is 1.89%
Whole route
73.4%
Every carrier on JAX to BOS, 1,628 flights
These figures cover 665 flights between September 2025 and August 2026. Beyond the headline rate, 14.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
JetBlue against every carrier on JAX to BOS
JetBlue flew 665 of the 1,628 flights on JAX to BOS, about 41% of it. Its 68.2% on time is 5 points worse than the route as a whole, which runs 73.4%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Delta at 81.0% to JetBlue at 68.2%. 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 | 66 | 81.0% | 151 min | 4.55% | B− |
| Republic Airways | 897 | 76.7% | 84 min | 1.34% | B |
| JetBlue Airways (this page) | 665 | 68.2% | 78 min | 3.61% | C− |
Flight by flight
JetBlue flight numbers on JAX to BOS
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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 44 points, against half a point between the best and worst carrier.
- 5am–8am37 flights97.3%
- 8am–11am136 flights88.0%
- 11am–2pm227 flights63.3%
- 2pm–5pm—
- 5pm–8pm130 flights61.7%
- 8pm–5am135 flights53.6%
Scale runs 45% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 53.6% 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 227 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 80.2% on time and Sunday the weakest at 60.6%, a spread of 20 points.
Arrival by arrival
How late JetBlue on JAX to BOS runs when it is late
JetBlue on JAX to BOS often beats the schedule: 173 of 641 completed flights, 27%, arrived 15 minutes or more early. The 204 late arrivals split 44 under half an hour, 70 between 30 and 60 minutes, and 90 an hour or more.
- 15+ min early173 flights27.0%
- Within 15 min264 flights41.2%
- 15–29 min late44 flights6.9%
- 30–59 min late70 flights10.9%
- 1–2 hours late65 flights10.1%
- 2+ hours late25 flights3.9%
Scale runs 0% to 100%.
Share of 641 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 203 departures that left 15 minutes late or more, only 24 made it up before arrival. 25 flights left on time and still arrived late.
The worst days
Worst days for JetBlue on JAX to BOS
The latest arrival of the period was on 27 July 2026, 14 hours 57 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 July 2026 | 14 hours 57 minutes | Carrier |
| 6 July 2026 | 14 hours 30 minutes | Carrier |
| 3 March 2026 | 6 hours 57 minutes | Late-arriving aircraft |
| 13 March 2026 | 5 hours 20 minutes | Late-arriving aircraft |
| 7 February 2026 | 5 hours 12 minutes | Late-arriving aircraft |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 53% of the 16,000 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 27%National Airspace System
- 19%Carrier
- 1%Extreme weather
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 16,000 reported delay minutes here, that single category outweighs weather by 53 to one. The split is drawn from 15,980 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 3.61%, against 1.89% 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
14.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
The return leg is a different operation and performs like one: it runs 75.9% on time across 665 flights, 8 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 8 points of difference.
One caution: this is a thin sample. 665 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 3.61% 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. 641 completed flights over 12 months sit behind that.
Related
Where to go next
- JAX to BOS, every carrier
- JetBlue on BOS to JAX, the return leg
- Republic Airways on JAX to BOS76.7%
- JetBlue Airways network-wide record
- Jacksonville International (JAX) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.