Carrier route record

DLATL→JFK

Delta Air Lines · Atlanta to New York

Flights: 2,448
Period: July 2025 to June 2026
Share of route: 57%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.

Delta on ATL to JFK lands a B, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 2,448 flights. The strongest carrier on the route with a full sample, JetBlue Airways, flew 1,080 at 70.6% on time.

The US average over the same twelve months is 77.6%, so there is little to separate Delta on ATL to JFK from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

79.7%

Arrivals under 15 minutes late, of 2,407 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

1.51%

National rate is 1.81%

Whole route

75.3%

Every carrier on ATL to JFK, 4,263 flights

These figures cover 2,448 flights between July 2025 and June 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Carrier by carrier

Delta against every carrier on ATL to JFK

Delta flew 2,448 of the 4,263 flights on ATL to JFK, most of the route. Its 79.7% on time is 4 points better than the route as a whole, which runs 75.3%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Delta at 79.7% to Frontier at 67.1%.

The two carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on ATL to JFK
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines (this page)	2,448	79.7%	75 min	1.51%	B
JetBlue Airways	1,080	70.6%	100 min	4.26%	C−
Frontier Airlines	735	67.1%	79 min	2.31%	C

JetBlue Airways cancels 4.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Flight by flight

Delta flight numbers on ATL to JFK

Departure window

When Delta runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against 4 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am318 flights90.4%
8am–11am418 flights92.0%
11am–2pm390 flights81.4%
2pm–5pm444 flights74.8%
5pm–8pm415 flights67.3%
8pm–5am463 flights75.5%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 92.0% of the time, against 67.3% for the evening window. That is 25 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 463 flights scheduled in it.

Across the year

Delta on ATL to JFK through the year

Darker means more delays. Figures are on-time percentages.September best, July worst

July is the worst month at 65.4% on time, 23 points below September, the best at 87.9%. 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. October was the busiest month here, with 218 flights.

Across the week, Wednesday is the strongest day at 82.5% on time and Sunday the weakest at 77.7%. 5 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 36,000 reported delay minutes.

National Airspace System
40%
Carrier
40%
Late-arriving aircraft
13%
Extreme weather
6%
Security
0%

The largest share of delay minutes, 40%, 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 15,000 of the 36,000 delay minutes reported here. The split is drawn from 36,440 reported delay minutes.

40% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 15,000 minutes out of 36,000, against a national NAS share of 21%.

Cancellations sit at 1.51% against a national 1.81%, which is ordinary. Diversions add another 0.16%.

Connections and stage length

What a delay here costs

7.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 760 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 82.2% on time across 2,456 flights, within 3 points 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 2,448 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.

What to do with this

Booking Delta on ATL to JFK

Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 87.9% on time and July 65.4%, a swing of 23 points. If the dates move at all, move them out of July before you think about anything else. 2,407 completed flights over 12 months sit behind that.

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.

Key figures