Carrier route record
DLJAX→JFK
Delta Air Lines · Jacksonville to New York
- Flights
- 256
- Period
- September 2025 to August 2026
- Share of route
- 22%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on JAX to JFK draws a D−. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about 2.3 hours behind schedule. Build slack into anything you connect to. That rests on 256 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so Delta on JAX to JFK runs 16 points behind the country as a whole. Across a thousand flights that is about 157 extra late arrivals.
Key figures
On time
61.6%
Arrivals under 15 minutes late, of 245 completed flights
Avg delay
137 min
Across delayed arrivals only, not all flights
Cancelled
4.30%
National rate is 1.89%
Whole route
74.2%
Every carrier on JAX to JFK, 1,188 flights
These figures cover 256 flights between September 2025 and August 2026. Beyond the headline rate, 22.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Delta against every carrier on JAX to JFK
Delta flew 256 of the 1,188 flights on JAX to JFK, about 22% of it. Its 61.6% on time is 13 points worse than the route as a whole, which runs 74.2%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Republic at 87.8% to Delta at 61.6%. 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 |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 41 | 87.8% | 86 min | 0.00% | A+ |
| JetBlue Airways | 891 | 77.2% | 72 min | 5.50% | B− |
| Delta Air Lines (this page)thin sample | 256 | 61.6% | 137 min | 4.30% | D− |
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Departure window
When Delta runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 256 flights.
There are not enough flights in each departure window to split Delta's JAX to JFK record by time of day without the percentages moving on noise. The headline rate of 61.6% is the reliable figure here.
Across the year
Delta on JAX to JFK through the year
- Jul–Sep 202530 flights—
- Oct–Dec 202599 flights66.7%
- Jan–Mar 20267 flights—
- Apr–Jun 202658 flights60.3%
- Jul–Sep 202662 flights44.8%
Scale runs 35% to 70%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 61.6% on time across 256 flights.
Delta on JAX to JFK did not run the same all year. Its best quarter was Oct–Dec 2025 at 66.7% on time and its weakest Jul–Sep 2026 at 44.8%, a swing of 22 points on roughly 85 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Wednesday is the strongest day at 73.5% on time and Monday the weakest at 54.1%, a spread of 19 points.
Arrival by arrival
How late Delta on JAX to JFK runs when it is late
Delta on JAX to JFK often beats the schedule: 84 of 245 completed flights, 34%, arrived 15 minutes or more early. When Delta on JAX to JFK is late it tends to be very late: 54 of its 94 late arrivals were an hour or more behind, and 32 were two hours or more.
- 15+ min early84 flights34.3%
- Within 15 min67 flights27.3%
- 15–29 min late16 flights6.5%
- 30–59 min late24 flights9.8%
- 1–2 hours late22 flights9.0%
- 2+ hours late32 flights13.1%
Scale runs 0% to 100%.
Share of 245 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 91 departures that left 15 minutes late or more, only 9 made it up before arrival. 12 flights left on time and still arrived late.
The worst days
Worst days for Delta on JAX to JFK
The latest arrival of the period was on 4 July 2026, 16 hours 40 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 July 2026 | 16 hours 40 minutes | Carrier |
| 22 June 2026 | 16 hours 36 minutes | Carrier |
| 5 December 2025 | 16 hours 12 minutes | Carrier |
| 30 October 2025 | 13 hours 34 minutes | Carrier |
| 21 May 2026 | 6 hours 10 minutes | Carrier |
Delay causes
Why Delta 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 13,000 reported delay minutes.
- 40%Carrier
- 31%Late-arriving aircraft
- 25%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,192 of the 13,000 delay minutes reported here. The split is drawn from 12,892 reported delay minutes.
Cancellations run at 4.30%, 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
22.0% 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 is a different operation and performs like one: it runs 73.4% on time across 256 flights, 12 points above 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 12 points of difference.
One caution: this is a thin sample. 256 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 Delta on JAX to JFK
Put together: the delay figures matter less here than the 4.30% cancellation rate. A late arrival costs you about 2.3 hours; a cancelled flight costs you the day. Book the 5pm–8pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 245 completed flights over 12 months sit behind that.
Related
Where to go next
- JAX to JFK, every carrier
- Delta on JFK to JAX, the return leg
- JetBlue Airways on JAX to JFK77.2%
- Delta Air Lines network-wide record
- Jacksonville International (JAX) delay statistics
- John F. Kennedy International (JFK) delay statistics
- The US routes with the most cancellations
- How often a connection fails at the major US hubs
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.