Airport month record
JFKAUG
John F. Kennedy International in August 2025
- Departures
- 9,110
- Month
- August 2025
- National, same month
- 77.4%
- Carriers
- 7
Historical statistics for August 2025, not live status or a forecast for this year’s August. For today’s conditions at JFK, see live FAA status.
JFK in August lands a B+, 2 points better than the national rate of 77.4%. 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 9,110 flights, of which Republic Airways flew 1,361 at 86.4% on time.
Republic Airways is the most reliable of the four carriers covered here at 86.4% on time across 1,361 flights.
Key figures
On time
79.0%
Arrivals under 15 minutes late, of 8,997 completed departures
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
0.92%
Nationally in August: 1.08%
Whole year
75.7%
JFK across all twelve months
These figures cover 9,110 departures from John F. Kennedy International in August 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
August next to JFK's other months
Against JFK's own year, August ran 3 points better than the twelve-month rate of 75.7%, which makes it number four of twelve months, best first. Cancellations were unusually low for JFK in August, at 0.92% against 3.06% across the year. Either side of it, July ran 67.8% on time and September 81.8%, so a trip moved by a few weeks would have landed in a worse stretch.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 | 9,262 | 67.8% | 91 min | 6.23% | C− |
| August 2025 (this page) | 9,110 | 79.0% | 75 min | 0.92% | B+ |
| September 2025 | 8,567 | 81.8% | 74 min | 0.74% | B+ |
| October 2025 | 8,928 | 74.2% | 69 min | 1.46% | C |
| November 2025 | 8,626 | 75.8% | 72 min | 2.83% | B |
| December 2025 | 8,856 | 65.6% | 76 min | 4.02% | C− |
| January 2026 | 8,022 | 73.6% | 69 min | 7.12% | C− |
| February 2026 | 7,458 | 75.2% | 74 min | 8.76% | B− |
| March 2026 | 8,392 | 76.4% | 75 min | 2.10% | B |
| April 2026 | 8,254 | 81.6% | 59 min | 0.24% | B+ |
| May 2026 | 8,535 | 82.1% | 73 min | 1.08% | B |
| June 2026 | 8,750 | 75.0% | 78 min | 2.02% | B |
Departure window
The best time of day to leave JFK in August
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 points, against 14 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,353 flights86.5%
- 8am–11am1,605 flights85.9%
- 11am–2pm1,439 flights82.0%
- 2pm–5pm1,597 flights77.8%
- 5pm–8pm1,558 flights73.1%
- 8pm–5am1,558 flights69.5%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 86.5% of the time, against 69.5% for the overnight window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 1,605 flights scheduled in it.
Across the week, Tuesday is the strongest day at 91.4% on time and Thursday the weakest at 73.6%. 18 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at JFK in August
The choice of carrier is not cosmetic here. Republic Airways arrives on time 86.4% of the time; JetBlue Airways manages 72.8%. Sample sizes sit next to every figure, because a two-point gap across 3,292 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| JetBlue Airways | 3,292 | 72.8% | 74 min | 0.82% | C+ |
| Delta Air Lines | 2,654 | 84.6% | 83 min | 0.83% | B+ |
| Republic Airways | 1,361 | 86.4% | 63 min | 1.62% | A |
| American Airlines | 1,134 | 81.8% | 87 min | 0.79% | B+ |
| Alaska Airlinesthin sample | 329 | 67.5% | 61 min | 0.91% | C+ |
| Frontier Airlinesthin sample | 309 | 66.9% | 59 min | 0.32% | C+ |
| Hawaiian Airlinesthin sample | 31 | 74.2% | 55 min | 0.00% | C+ |
The spread between Republic and JetBlue is 14 points, wide enough that it should decide the booking. On a hundred trips that is 14 more arrivals inside the on-time window.
Route by route
Busiest routes out of JFK in August
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| JFK to LAX · Los Angeles | 912 | 84.7% | 90 min | 0.11% | B+ |
| JFK to SFO · San Francisco | 591 | 84.4% | 78 min | 0.17% | B+ |
| JFK to BOS · Boston | 500 | 80.8% | 80 min | 1.00% | B |
| JFK to MCO · Orlando | 434 | 69.6% | 73 min | 1.38% | C |
| JFK to ATL · Atlanta | 375 | 78.1% | 74 min | 0.53% | B+ |
| JFK to MIA · Miami | 375 | 75.3% | 97 min | 1.33% | B |
| JFK to SJU · San Juanthin sample | 359 | 63.4% | 74 min | 0.84% | D+ |
| JFK to LAS · Las Vegasthin sample | 314 | 87.2% | 71 min | 0.32% | A+ |
| JFK to FLL · Fort Lauderdalethin sample | 293 | 73.6% | 88 min | 1.02% | C |
| JFK to SEA · Seattlethin sample | 278 | 73.9% | 59 min | 0.72% | C+ |
| JFK to DFW · Dallas-Fort Worththin sample | 217 | 76.8% | 68 min | 1.38% | B |
| JFK to DCA · Washingtonthin sample | 217 | 79.7% | 76 min | 2.30% | B |
| JFK to SAN · San Diegothin sample | 211 | 83.3% | 76 min | 0.47% | B+ |
| JFK to TPA · Tampathin sample | 208 | 74.0% | 70 min | 0.48% | C+ |
| JFK to PHX · Phoenixthin sample | 203 | 85.5% | 46 min | 1.48% | A |
| JFK to RDU · Raleighthin sample | 201 | 84.8% | 57 min | 1.49% | B |
| JFK to AUS · Austinthin sample | 176 | 83.3% | 94 min | 1.14% | B |
| JFK to CLT · Charlottethin sample | 158 | 83.5% | 72 min | 0.00% | B+ |
| JFK to ORD · Chicagothin sample | 155 | 81.8% | 82 min | 3.87% | B− |
| JFK to PIT · Pittsburghthin sample | 155 | 82.1% | 61 min | 2.58% | B |
| JFK to CMH · Columbusthin sample | 155 | 84.3% | 83 min | 1.29% | B |
| JFK to PBI · West Palm Beachthin sample | 155 | 71.5% | 79 min | 2.58% | C |
| JFK to SLC · Salt Lake Citythin sample | 154 | 87.7% | 67 min | 0.00% | A+ |
| JFK to DEN · Denverthin sample | 154 | 74.3% | 65 min | 1.30% | C |
| JFK to DTW · Detroitthin sample | 124 | 75.6% | 95 min | 0.81% | B+ |
Delay causes
What held JFK up in August
One category carries most of the weight here. Late-arriving aircraft accounts for 42% of the 141,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 42%Late-arriving aircraft
- 34%Carrier
- 20%National Airspace System
- 3%Extreme weather
- 0%Security
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 141,000 reported delay minutes here, that single category outweighs weather by 13 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 141,077 reported delay minutes.
Cancellations sit at 0.92% against a national 1.08%, which is ordinary. Diversions add another 0.32%.
8.6% of arrivals land an hour or more late, close to the national 8.2%. 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.
What to do with this
Flying from JFK in August
For a August trip through JFK: expect 79.0% on time and 0.92% cancelled, going by August 2025. The 5am–8am window was the strongest part of the day.
Related
Where to go next
- John F. Kennedy International (JFK), the whole year
- JFK in July67.8%
- JFK in September81.8%
- JFK in October74.2%
- JFK in November75.8%
- JFK in December65.6%
- JFK in January73.6%
- JFK in February75.2%
- JFK in March76.4%
- JFK in April81.6%
- JFK in May82.1%
- JFK in June75.0%
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.