Carrier route record
B6JFK→JAX
JetBlue Airways · New York to Jacksonville
- Flights
- 891
- Period
- July 2025 to June 2026
- Share of route
- 75%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on JFK to JAX carries a cancellation problem, not just a delay problem: 3.6% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 891 flights, with a median arrival 6 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate JetBlue on JFK 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
74.4%
Arrivals under 15 minutes late, of 857 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
3.59%
National rate is 1.81%
Whole route
75.4%
Every carrier on JFK to JAX, 1,186 flights
These figures cover 891 flights between July 2025 and June 2026. Beyond the headline rate, 11.1% 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 JFK to JAX
JetBlue flew 891 of the 1,186 flights on JFK to JAX, most of the route. Its 74.4% on time is about level with the route as a whole at 75.4%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Republic at 91.1% to JetBlue at 74.4%. Two 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 |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 45 | 91.1% | 74 min | 0.00% | A+ |
| Delta Air Linesthin sample | 250 | 75.7% | 101 min | 2.80% | B |
| JetBlue Airways (this page) | 891 | 74.4% | 73 min | 3.59% | C− |
Flight by flight
JetBlue flight numbers on JFK to JAX
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. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am138 flights84.7%
- 8am–11am137 flights89.6%
- 11am–2pm119 flights63.2%
- 2pm–5pm187 flights69.6%
- 5pm–8pm166 flights69.9%
- 8pm–5am144 flights70.7%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 63.2% on time against 89.6% for 8am–11am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 2pm–5pm window is the busiest, with 187 flights scheduled in it.
Across the year
JetBlue on JFK to JAX through the year
July is the worst month at 52.6% on time, 38 points below May, the best at 90.3%. 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. December was the busiest month here, with 92 flights.
Across the week, Tuesday is the strongest day at 81.9% on time and Sunday the weakest at 66.1%. 16 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 16,000 reported delay minutes.
- 40%Late-arriving aircraft
- 37%Carrier
- 20%National Airspace System
- 4%Extreme weather
- 0%Security
40% 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 16,000 reported delay minutes here, that single category outweighs weather by 11 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 15,927 reported delay minutes.
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 5,820 of the 16,000 delay minutes reported here.
Cancellations run at 3.59%, 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. 11.1% 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 829 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 77.0% on time across 891 flights, within 3 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 891 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 JFK to JAX
Put together: the delay figures matter less here than the 3.59% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 857 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.