Carrier route record
B6BOS→JAX
JetBlue Airways · Boston to Jacksonville
- 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 BOS to JAX sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, about a point 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 8 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate JetBlue on BOS to JAX from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.9%
Arrivals under 15 minutes late, of 638 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
3.76%
National rate is 1.89%
Whole route
74.3%
Every carrier on BOS to JAX, 1,625 flights
These figures cover 665 flights between September 2025 and August 2026. Beyond the headline rate, 9.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
JetBlue against every carrier on BOS to JAX
JetBlue flew 665 of the 1,625 flights on BOS to JAX, about 41% of it. Its 75.9% on time is 2 points better than the route as a whole, which runs 74.3%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 82.5% to Republic at 72.5%. 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 | 82.5% | 76 min | 4.55% | B− |
| JetBlue Airways (this page) | 665 | 75.9% | 71 min | 3.76% | B− |
| Republic Airways | 894 | 72.5% | 65 min | 2.13% | C |
Flight by flight
JetBlue flight numbers on BOS to JAX
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 26 points, against half a point between the best and worst carrier.
- 5am–8am268 flights86.9%
- 8am–11am95 flights78.7%
- 11am–2pm25 flights—
- 2pm–5pm165 flights68.6%
- 5pm–8pm111 flights61.0%
- 8pm–5am1 flights—
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 61.0% on time, against 86.9% 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 5am–8am window is the busiest, with 268 flights scheduled in it.
Across the year
JetBlue on BOS to JAX through the year
February is the weak month at 62.5% on time, against 95.7% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. May was the busiest month here, with 75 flights.
Across the week, Saturday is the strongest day at 83.3% on time and Friday the weakest at 66.3%, a spread of 17 points.
Arrival by arrival
How late JetBlue on BOS to JAX runs when it is late
JetBlue on BOS to JAX often beats the schedule: 230 of 638 completed flights, 36%, arrived 15 minutes or more early. The 154 late arrivals split 45 under half an hour, 46 between 30 and 60 minutes, and 63 an hour or more.
- 15+ min early230 flights36.1%
- Within 15 min254 flights39.8%
- 15–29 min late45 flights7.1%
- 30–59 min late46 flights7.2%
- 1–2 hours late38 flights6.0%
- 2+ hours late25 flights3.9%
Scale runs 0% to 100%.
Share of 638 completed flights by arrival against schedule.
38 of 164 late departures made up the time and arrived on time, 23% of them. 28 flights left on time and still arrived late.
The worst days
Worst days for JetBlue on BOS to JAX
The latest arrival of the period was on 3 March 2026, 6 hours 31 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 March 2026 | 6 hours 31 minutes | Late-arriving aircraft |
| 13 March 2026 | 5 hours 45 minutes | Late-arriving aircraft |
| 22 August 2026 | 4 hours 42 minutes | Late-arriving aircraft |
| 4 June 2026 | 4 hours 24 minutes | Late-arriving aircraft |
| 24 January 2026 | 4 hours 23 minutes | National Airspace System |
Delay causes
Why JetBlue runs late on this route
Late-arriving aircraft accounts for 44% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 30%Carrier
- 25%National Airspace System
- 2%Extreme weather
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 27 to one. The split is drawn from 10,941 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 86.9% on time here.
Cancellations run at 3.76%, against 1.89% nationally. That is about one flight in 25 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
9.9% 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 68.2% on time across 665 flights, 8 points below 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 BOS to JAX
Put together: the delay figures matter less here than the 3.76% 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
- BOS to JAX, every carrier
- JetBlue on JAX to BOS, the return leg
- Republic Airways on BOS to JAX72.5%
- JetBlue Airways network-wide record
- Boston Logan International (BOS) delay statistics
- Jacksonville International (JAX) 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.