Route reliability record
JFK→JAX
New York to Jacksonville
- Flights
- 1,187
- Period
- September 2025 to August 2026
- Distance
- 829 mi
- Carriers
- 3
This route carries a cancellation problem, not just a delay problem: 4.6% of scheduled flights never operate, against 1.9% 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 JFK to JAX flights, with a median arrival 7 minutes early.
Best time to fly JFK to JAX: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 90.4% of the time and Wednesday flights 80.9%, against 74.0% for the route overall.
The US average over the same twelve months is 77.3%, 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
74.0%
Arrivals under 15 minutes late, of 1,130 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
4.63%
National rate is 1.89%
Best carrier
JetBlue
73.4% on time across 891 flights
These figures cover 1,187 flights between September 2025 and August 2026. Beyond the headline rate, 11.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on JFK to JAX
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 | 40 | 90.0% | 74 min | 0.00% | A+ |
| JetBlue Airways | 891 | 73.4% | 73 min | 4.94% | C− |
| Delta Air Linesthin sample | 256 | 73.4% | 107 min | 4.30% | C− |
Flight by flight
Flights on JFK to JAX
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.
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.
Best ways to make this trip
The most reliable ways to fly New York to Jacksonville
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. EWR → JAXNewark to Jacksonville | United Airlines | 78.8% | 80.4% | 2.02% | 5am–8am, Fri | UA 1207 06:00 |
| 2. JFK → JAXNew York to Jacksonville | JetBlue Airways | 69.8% | 73.4% | 4.94% | 8am–11am, Tue | B6 677 13:59 |
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 28 points, against half a point between the best and worst carrier.
- 5am–8am138 flights84.7%
- 8am–11am158 flights90.4%
- 11am–2pm152 flights70.5%
- 2pm–5pm413 flights69.6%
- 5pm–8pm107 flights80.0%
- 8pm–5am219 flights62.6%
Scale runs 55% to 95%.
The 8pm–5am window is where this operation falls apart: 62.6% on time, against 90.4% for the 8am–11am 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 2pm–5pm window is the busiest, with 413 flights scheduled in it.
Explore
Filter JFK to JAX by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On JFK to JAX, the best departure window is 8am–11am at 90.4% on time and the worst is 8pm–5am at 62.6%, a wide gap of 27.8 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am84.7%
- 8–11am90.4%
- 11am–2pm70.5%
- 2–5pm69.6%
- 5–8pm80.0%
- 8pm–5am62.6%
best all US flightsScale 55% to 95%.
Across the year
When delays peak on this route
This route's year swings by 33 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.
August is the worst month at 57.0% on time, 33 points below February, the best at 90.0%. 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 133 flights.
Across the week, Wednesday is the strongest day at 80.9% on time and Sunday the weakest at 66.0%, a spread of 15 points.
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 24,000 reported delay minutes.
- 38%Late-arriving aircraft
- 36%Carrier
- 23%National Airspace System
- 3%Extreme weather
- 0%Security
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 24,000 reported delay minutes here, that single category outweighs weather by 15 to one. The split is drawn from 23,586 reported delay minutes.
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 8,465 of the 24,000 delay minutes reported here.
Cancellations run at 4.63%, against 1.89% nationally. That is about one flight in twenty 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
11.6% 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 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.
The return leg runs 74.2% on time across 1,188 flights, within half 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 JAX after this flight
What to do with this
Booking this route
Put together: the delay figures matter less here than the 4.63% 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. 1,130 completed flights over 12 months sit behind that.
Common questions
JFK to JAX questions
How often is JFK to JAX 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 26.0% of the 1,187 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is JFK to JAX compared with the rest of the country?
74.0% of flights arrive on time here against a national 77.3%, 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 JFK to JAX?
The 8am–11am departure window is the strongest at 90.4% on time. The 8pm–5am window is the weakest at 62.6%, 28 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 August delays on JFK to JAX?
August is the weakest month at 57.0% on time, compared with 90.0% in February. Across the year that is 33 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
- JAX to JFK — the return legseparate record
- John F. Kennedy International (JFK) delay statistics
- Jacksonville International (JAX) delay statistics
- JetBlue Airways on JFK to JAX73.4%
- Delta Air Lines on JFK to JAX73.4%
- JFK to LAX, a related route75.4%
- ATL to JAX, a related route75.1%
- JFK to SFO, a related route71.4%
- Republic Airways on-time record90.0%
- JetBlue Airways on-time record73.4%
- Delta Air Lines on-time record73.4%
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Direction matters. JFK to JAX and JAX to JFK 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.