Route reliability record
JAX→JFK
Jacksonville to New York
- Flights
- 1,187
- Period
- July 2025 to June 2026
- Distance
- 829 mi
- Carriers
- 3
This route carries a cancellation problem, not just a delay problem: 3.8% 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 1,187 JAX to JFK flights, with a median arrival 7 minutes early.
Best time to fly JAX to JFK: a 5am–8am departure, ideally on a Friday. Flights in that window arrived on time 90.2% of the time and Friday flights 81.1%, against 74.4% for the route overall.
The US average over the same twelve months is 77.6%, so there is little to separate this route 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 1,135 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
3.79%
National rate is 1.81%
Best carrier
JetBlue
77.0% on time across 891 flights
These figures cover 1,187 flights between July 2025 and June 2026. Beyond the headline rate, 11.0% 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
Which airline is most reliable on JAX to JFK
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 | 46 | 84.4% | 94 min | 2.17% | B |
| JetBlue Airways | 891 | 77.0% | 70 min | 4.04% | B− |
| Delta Air Linesthin sample | 250 | 63.6% | 125 min | 3.20% | D− |
Flight by flight
Flights on JAX to JFK
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
Best ways to make this trip
The most reliable ways to fly Jacksonville to New York
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 1 of the top 2 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. JAX → EWRJacksonville to Newark | United Airlines | 78.6% | 79.9% | 1.62% | 5am–8am, Fri | UA 1144 09:40 |
| 2. JAX → JFKJacksonville to New York | JetBlue Airways | 73.9% | 77.0% | 4.04% | 5am–8am, Fri | B6 1678 06:20 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 34 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–8am293 flights90.2%
- 8am–11am158 flights80.5%
- 11am–2pm111 flights82.6%
- 2pm–5pm125 flights71.6%
- 5pm–8pm445 flights62.7%
- 8pm–5am55 flights55.8%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 55.8% on time, against 90.2% 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 445 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 36 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
July is the worst month at 50.0% on time, 36 points below April, the best at 85.7%. 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 134 flights.
Across the week, Friday is the strongest day at 81.1% on time and Thursday the weakest at 68.8%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
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 25,000 reported delay minutes.
- 40%Late-arriving aircraft
- 31%Carrier
- 27%National Airspace System
- 3%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 25,000 reported delay minutes here, that single category outweighs weather by 14 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 25,238 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 90.2% on time here.
Cancellations run at 3.79%, against 1.81% 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 actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.0% 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 75.4% on time across 1,186 flights, within about 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 1,187 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.
Work out the risk of missing a connection in JFK after this flight
What to do with this
Booking this route
Put together: the delay figures matter less here than the 3.79% cancellation rate. A late arrival costs you an hour and a half; 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. 1,135 completed flights over 12 months sit behind that.
Common questions
JAX to JFK questions
How often is JAX to JFK delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 25.6% of the 1,187 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
How reliable is JAX to JFK compared with the rest of the country?
74.4% of flights arrive on time here against a national 77.6%, a difference of 3 points against it. That is worth a C− on this site's grading scale.
What time of day has the fewest delays on JAX to JFK?
The 5am–8am departure window is the strongest at 90.2% on time. The 8pm–5am window is the weakest at 55.8%, 34 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on JAX to JFK?
July is the weakest month at 50.0% on time, compared with 85.7% in April. Across the year that is 36 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- JFK to JAX — the return legseparate record
- John F. Kennedy International (JFK) delay statistics
- JetBlue Airways on JAX to JFK77.0%
- Delta Air Lines on JAX to JFK63.6%
- JAX to ATL, a related route84.9%
- LAX to JFK, a related route79.1%
- JAX to ORD, a related route77.3%
- Republic Airways on-time record84.4%
- JetBlue Airways on-time record77.0%
- Delta Air Lines on-time record63.6%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. JAX to JFK and JFK to JAX are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.