Carrier route record
DLJAX→JFK
Delta Air Lines · Jacksonville to New York
- Flights
- 250
- Period
- July 2025 to June 2026
- Share of route
- 21%
- Carriers
- 3
Historical statistics for July 2025 to June 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 2.1 hours behind schedule. Build slack into anything you connect to. That rests on 250 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.6%, so Delta on JAX to JFK runs 14 points behind the country as a whole. Across a thousand flights that is about 140 extra late arrivals.
Key figures
On time
63.6%
Arrivals under 15 minutes late, of 239 completed flights
Avg delay
125 min
Across delayed arrivals only, not all flights
Cancelled
3.20%
National rate is 1.81%
Whole route
74.4%
Every carrier on JAX to JFK, 1,187 flights
These figures cover 250 flights between July 2025 and June 2026. Beyond the headline rate, 20.5% 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
Delta against every carrier on JAX to JFK
Delta flew 250 of the 1,187 flights on JAX to JFK, about 21% of it. Its 63.6% on time is 11 points worse than the route as a whole, which runs 74.4%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Republic at 84.4% to Delta at 63.6%. 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 | 46 | 84.4% | 94 min | 2.17% | B |
| JetBlue Airways | 891 | 77.0% | 70 min | 4.04% | B− |
| Delta Air Lines (this page)thin sample | 250 | 63.6% | 125 min | 3.20% | D− |
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 250 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 63.6% is the reliable figure here.
Across the year
Delta on JAX to JFK through the year
- Jul–Sep 202586 flights63.0%
- Oct–Dec 202599 flights66.7%
- Jan–Mar 20267 flights—
- Apr–Jun 202658 flights60.3%
Scale runs 50% 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 63.6% on time across 250 flights.
Quarter by quarter Delta on JAX to JFK held fairly steady: 63.0% in Jul–Sep 2025, 66.7% in Oct–Dec 2025 and 60.3% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
Across the week, Wednesday is the strongest day at 69.7% on time and Thursday the weakest at 57.6%. 12 points is a smaller lever than departure hour, but it is free.
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 11,000 reported delay minutes.
- 37%Carrier
- 31%Late-arriving aircraft
- 28%National Airspace System
- 4%Extreme weather
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 4,082 of the 11,000 delay minutes reported here. The split is drawn from 10,893 reported delay minutes.
Cancellations run at 3.20%, 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. 20.5% 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 is a different operation and performs like one: it runs 75.7% on time across 250 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. 250 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 3.20% cancellation rate. A late arrival costs you about 2.1 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. 239 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.