Route reliability record
ATL→JFK
Atlanta to New York
- Flights
- 4,263
- Period
- July 2025 to June 2026
- Distance
- 760 mi
- Carriers
- 3
This route sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 4,263 flights, of which Delta Air Lines flew 2,448 at 79.7% on time.
Delta Air Lines is the most reliable of the three carriers covered here at 79.7% on time across 2,448 flights.
Key figures
On time
75.3%
Arrivals under 15 minutes late, of 4,155 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
2.35%
National rate is 1.81%
Best carrier
Delta
79.7% on time across 2,448 flights
These figures cover 4,263 flights between July 2025 and June 2026. Beyond the headline rate, 10.3% 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
Which airline is most reliable on ATL to JFK
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 79.7% of the time; Frontier Airlines manages 67.1%. Sample sizes sit next to every figure, because a two-point gap across 735 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 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.
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 21 points, against 13 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am780 flights84.9%
- 8am–11am765 flights84.6%
- 11am–2pm676 flights77.3%
- 2pm–5pm563 flights72.8%
- 5pm–8pm676 flights64.3%
- 8pm–5am803 flights66.2%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 64.3% on time, against 84.9% for the 5am–8am 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 8pm–5am window is the busiest, with 803 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 23 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.
July is the worst month at 61.5% on time, 23 points below September, the best at 84.7%. 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 400 flights.
Across the week, Wednesday is the strongest day at 80.6% on time and Sunday the weakest at 71.4%. 9 points is a smaller lever than departure hour, but it is free.
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 85,000 reported delay minutes.
- 37%Carrier
- 32%Late-arriving aircraft
- 27%National Airspace System
- 3%Extreme weather
- 0%Security
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 32,000 of the 85,000 delay minutes reported here. The split is drawn from 85,312 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 84.9% on time here.
Cancellations sit at 2.35% against a national 1.81%, which is ordinary. Diversions add another 0.19%.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.3% 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 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 76.7% on time across 4,272 flights, within about 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 4,263 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 this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 84.7% on time and July 61.5%, a swing of 23 points. If the dates move at all, move them out of July before you think about anything else. 4,155 completed flights over 12 months sit behind that.
Common questions
ATL to JFK questions
How often is ATL to JFK delayed?
About one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 24.7% of the 4,263 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
Which airline is most reliable on ATL to JFK?
Delta Air Lines leads at 79.7% on time across 2,448 flights. Frontier Airlines is at the other end on 67.1%, a gap of 13 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on ATL to JFK?
The 5am–8am departure window is the strongest at 84.9% on time. The 5pm–8pm window is the weakest at 64.3%, 21 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 July delays on ATL to JFK?
July is the weakest month at 61.5% on time, compared with 84.7% in September. Across the year that is 23 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
- JFK to ATL — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- John F. Kennedy International (JFK) delay statistics
- Delta Air Lines on-time record79.7%
- JetBlue Airways on-time record70.6%
- Frontier Airlines on-time record67.1%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. ATL to JFK and JFK to ATL are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.