Route profile
JFK→JAX
Flight reliability, delays and best times to fly from New York to Jacksonville, 828 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 11% of comparable major US routes (4,598 compared)
Calculated from 4,746 flights. How this is calculated
JFK → JAX arrives on time 76.4% of the time; the return trip, JAX → JFK, arrives on time 77.0% of the time.
JFK → JAX spends 32.6 minutes on the ground on an 828-mile trip: 26.7 minutes from pushback to wheels-up at JFK and 5.9 minutes from touchdown to gate at JAX.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Reliability here swings unusually widely by season, a wider month-to-month spread than 92% of 3,357 comparable routes.
89.1% on time in a typical April, against 64.3% in July.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 3,357 in the comparison.
What sets this route apart
Where JFK to JAX differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
JFK to JAX struggles most at 5 PM: 55.5% of its flights scheduled then arrive on time, 11.6 points behind the 67.1% on routes of similar length at the same hour. Against all other routes the gap is 14.3 points.
JFK to JAX is at its best against routes of similar length for flights scheduled at 6 PM: 74.3% arrive on time, 7.2 points ahead of the 67.1% those routes manage at that hour. Against all other routes the gap is 5.7 points.
Saturday is the day JFK to JAX slips furthest against routes of similar length, 72.7% on time where they average 78.4%, 5.7 points lower. Against all other routes the gap is 6.4 points.
March is kinder to JFK to JAX than to routes of similar length: 86.9% on time against 77.5%, 9.4 points better. Against all other routes the gap is 9 points.
In January, JFK to JAX runs 8.5 points below routes of similar length, 70.3% on time to 78.8%. Against all other routes the gap is 8.8 points.
JFK to JAX against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 5 PM departures | 55.5% | routes of similar length | 67.1% | −11.6 pts | 137 here, 137,556 there |
| Hour: 6 PM departures | 74.3% | routes of similar length | 67.1% | +7.2 pts | 432 here, 153,634 there |
| Weekday: Saturday | 72.7% | routes of similar length | 78.4% | −5.7 pts | 648 here, 304,545 there |
| Month: March | 86.9% | routes of similar length | 77.5% | +9.4 pts | 336 here, 198,198 there |
| Month: January | 70.3% | routes of similar length | 78.8% | −8.5 pts | 343 here, 174,812 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 828 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why JFK → JAX flights are cancelled
July 2023 – July 2026
JFK → JAX cancelled 161 of 4,746 scheduled flights — about 1 in every 29. The reason filed most often was the air traffic system, 49.7% of the cancellations coded on this route — about 1 in every 59 scheduled flights.
Share of cancellations
Of 161 cancelled departures carrying a reason code.
What each reason means
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
80 cancellations, 49.7% of the total.
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
47 cancellations, 29.2% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
34 cancellations, 21.1% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
161 coded cancellations were recorded on JFK → JAX; the section appears from 50.
When it goes wrong
July 2023 – July 2026
61 min late
against a median of 8 min early
JFK → JAX has an average that understates its risk: a typical arrival is 8 min early, but the worst tenth are 69 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 4,746 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at JAX after arriving from JFK.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 36% | Likely to miss |
| 45 min | 23% | High risk |
| 60 min | 16% | High risk |
| 90 min | 10% | Some risk |
| 120 min | 6.4% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 3.39% of the time and diverts 0.27% of the time, which a late arrival never shows up in.
Chance of missing is the share of 4,572 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 61 minutes late (90th-percentile gate arrival delay), over 4,746 operations.
Any other layover length: connection checker.
Best time to fly
JFK → JAX flights departing 5–9 AM arrived on time 85.6% of the time, against 63.8% for 3–6 PM departures, a gap of 21.8 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 84.2% on time from 308 flights
- 7 AM: 84.3% on time from 695 flights
- 8 AM: 88.8% on time from 441 flights
- 9 AM to 11 AM: too few flights to score
- 12 PM: 83.1% on time from 232 flights
- 1 PM: 75.2% on time from 497 flights
- 2 PM: 75.8% on time from 600 flights
- 3 PM: 65.1% on time from 349 flights
- 4 PM: 68.6% on time from 158 flights
- 5 PM: 55.5% on time from 151 flights
- 6 PM: 74.3% on time from 456 flights
- 7 PM: 73.1% on time from 204 flights
- 8 PM: 63.8% on time from 327 flights
- 9 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why JFK → JAX runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for JFK → JAX. Only delays of 15 minutes or more are attributed.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| JetBlue | 2,492 | 71.6% | 3.65% | -4 min | 12.6% |
| Delta Air Lines | 1,015 | 79.4% | 1.77% | -11 min | 10.4% |
| Republic Airways | 738 | 84.4% | 3.66% | -13 min | 4.1% |
| Endeavor Air | 501 | 82.6% | 4.99% | -13 min | 7.1% |
JetBlue flew 52.5% of the 4,746 flights listed. Endeavor Air cancelled 4.99% of its flights here against 1.77% for Delta Air Lines.
Republic Airways arrived on time 12.8 percentage points more often than JetBlue on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Saturday the least, a gap of 8.9 percentage points.
By month
- Jan: 70.3%
- Feb: 78.6%
- Mar: 86.9%
- Apr: 89.1%
- May: 78.4%
- Jun: 72.1%
- Jul: 64.3%
- Aug: 73.4%
- Sep: 77.1%
- Oct: 78.0%
- Nov: 82.3%
- Dec: 70.5%
July is historically the weakest month and April the strongest, a spread of 24.8 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 65.2% from 150 flights
- August 2023: 79.7% from 151 flights
- September 2023: 70.9% from 139 flights
- October 2023: 79.4% from 155 flights
- November 2023: 82.6% from 155 flights
- December 2023: 75.0% from 154 flights
- January 2024: 70.1% from 129 flights
- February 2024: 85.4% from 131 flights
- March 2024: 87.6% from 155 flights
- April 2024: 89.2% from 150 flights
- May 2024: 78.8% from 155 flights
- June 2024: 75.0% from 150 flights
- July 2024: 65.5% from 155 flights
- August 2024: 66.7% from 155 flights
- September 2024: 82.4% from 167 flights
- October 2024: 80.7% from 172 flights
- November 2024: 90.6% from 170 flights
- December 2024: 73.2% from 180 flights
- January 2025: 69.9% from 152 flights
- February 2025: 67.4% from 134 flights
- March 2025: too few flights to score (103)
- April 2025: too few flights to score (90)
- May 2025: too few flights to score (117)
- June 2025: too few flights to score (98)
- July 2025: too few flights to score (92)
- August 2025: too few flights to score (93)
- September 2025: too few flights to score (111)
- October 2025: too few flights to score (116)
- November 2025: too few flights to score (118)
- December 2025: 61.0% from 133 flights
- January 2026: too few flights to score (73)
- February 2026: too few flights to score (56)
- March 2026: too few flights to score (82)
- April 2026: too few flights to score (91)
- May 2026: 86.6% from 120 flights
- June 2026: too few flights to score (101)
- July 2026: too few flights to score (93)
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 75.0% against 75.8% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 4,746 JFK → JAX flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed