Route profile
JFK→MIA
Flight reliability, delays and best times to fly from New York to Miami, 1,089 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 16% of comparable major US routes (4,598 compared)
Calculated from 15,837 flights. How this is calculated
JFK → MIA arrives on time 75.0% of the time; the return trip, MIA → JFK, arrives on time 71.5% of the time, a 3.5-point gap between the two directions of the same city pair.
JFK → MIA spends 36.0 minutes on the ground on a 1,089-mile trip: 25.6 minutes from pushback to wheels-up at JFK and 10.4 minutes from touchdown to gate at MIA.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Why JFK → MIA flights are cancelled
July 2023 – July 2026
JFK → MIA cancelled 332 of 15,837 scheduled flights — about 1 in every 48. The reason filed most often was extreme weather, 63.9% of the cancellations coded on this route — about 1 in every 75 scheduled flights.
Share of cancellations
Of 332 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
212 cancellations, 63.9% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
85 cancellations, 25.6% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
35 cancellations, 10.5% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
332 coded cancellations were recorded on JFK → MIA; the section appears from 50.
When it goes wrong
July 2023 – July 2026
61 min late
against a median of 7 min early
JFK → MIA has an average that understates its risk: a typical arrival is 7 min early, but the worst tenth are 68 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 15,837 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at MIA after arriving from JFK.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 38% | Likely to miss |
| 45 min | 24% | High risk |
| 60 min | 17% | High risk |
| 90 min | 10% | Some risk |
| 120 min | 6.5% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 2.10% of the time and diverts 0.35% of the time, which a late arrival never shows up in.
Chance of missing is the share of 15,449 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 61 minutes late (90th-percentile gate arrival delay), over 15,837 operations.
Any other layover length: connection checker.
Best time to fly
JFK → MIA flights departing 5–9 AM arrived on time 86.8% of the time, against 65.3% for 6–9 PM departures, a gap of 21.5 percentage points.
By day and hour
On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (JFK).
Hour of departure matters more than day of the week: hourly averages sit a typical 9.1 points from the route-wide rate, weekday averages 3.0 points.
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On-time rate, % · stronger color, fewer on time
- 50–59
- 60–69
- 70–79
- 80–89
- 90–99
- Fewer than 120 flights, not scored
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.
No slot is named best or worst: too few reach 500 flights. Departures after 8 PM (502 flights) are not drawn: no slot in those hours has enough flights to score.
View as tableHide table
| Hour | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|---|---|---|---|---|---|---|---|
| 5 AM–6 AM | 91.6% on time124 flights | 112 flights, too few to score | 90.3% on time125 flights | 109 flights, too few to score | 119 flights, too few to score | 100 flights, too few to score | 117 flights, too few to score |
| 6 AM–7 AM | 88.1% on time205 flights | 90.6% on time210 flights | 88.3% on time200 flights | 91.4% on time213 flights | 88.3% on time207 flights | 87.4% on time178 flights | 82.4% on time192 flights |
| 7 AM–8 AM | 88.3% on time311 flights | 85.6% on time316 flights | 86.4% on time320 flights | 86.2% on time316 flights | 82.6% on time312 flights | 84.8% on time299 flights | 84.5% on time324 flights |
| 8 AM–9 AM | 46 flights, too few to score | 45 flights, too few to score | 39 flights, too few to score | 43 flights, too few to score | 49 flights, too few to score | 62 flights, too few to score | 49 flights, too few to score |
| 9 AM–10 AM | 114 flights, too few to score | 111 flights, too few to score | 116 flights, too few to score | 113 flights, too few to score | 111 flights, too few to score | 104 flights, too few to score | 113 flights, too few to score |
| 10 AM–11 AM | 59 flights, too few to score | 60 flights, too few to score | 51 flights, too few to score | 61 flights, too few to score | 54 flights, too few to score | 56 flights, too few to score | 57 flights, too few to score |
| 11 AM–12 PM | 73.6% on time279 flights | 82.7% on time267 flights | 81.1% on time264 flights | 74.3% on time273 flights | 74.1% on time281 flights | 76.1% on time279 flights | 70.4% on time285 flights |
| 12 PM–1 PM | 110 flights, too few to score | 73.8% on time122 flights | 79.5% on time126 flights | 112 flights, too few to score | 111 flights, too few to score | 117 flights, too few to score | 114 flights, too few to score |
| 1 PM–2 PM | 96 flights, too few to score | 84 flights, too few to score | 91 flights, too few to score | 89 flights, too few to score | 94 flights, too few to score | 89 flights, too few to score | 91 flights, too few to score |
| 2 PM–3 PM | 83 flights, too few to score | 82 flights, too few to score | 80 flights, too few to score | 88 flights, too few to score | 85 flights, too few to score | 73 flights, too few to score | 85 flights, too few to score |
| 3 PM–4 PM | 66.8% on time222 flights | 64.9% on time193 flights | 70.7% on time192 flights | 62.3% on time222 flights | 70.8% on time221 flights | 69.1% on time211 flights | 62.4% on time223 flights |
| 4 PM–5 PM | 54 flights, too few to score | 51 flights, too few to score | 48 flights, too few to score | 51 flights, too few to score | 51 flights, too few to score | 64 flights, too few to score | 54 flights, too few to score |
| 5 PM–6 PM | 64.0% on time192 flights | 71.2% on time223 flights | 70.2% on time223 flights | 63.7% on time187 flights | 65.2% on time190 flights | 61.5% on time186 flights | 62.9% on time187 flights |
| 6 PM–7 PM | 67.3% on time167 flights | 75.5% on time164 flights | 70.1% on time161 flights | 60.3% on time162 flights | 74.1% on time165 flights | 65.3% on time151 flights | 55.6% on time170 flights |
| 7 PM–8 PM | 61.7% on time170 flights | 75.0% on time133 flights | 63.6% on time133 flights | 61.0% on time168 flights | 66.5% on time170 flights | 66.0% on time147 flights | 50.0% on time157 flights |
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 90.8% on time from 806 flights
- 6 AM: 88.2% on time from 1,405 flights
- 7 AM: 85.5% on time from 2,198 flights
- 8 AM: 79.8% on time from 333 flights
- 9 AM: 79.6% on time from 782 flights
- 10 AM: 76.7% on time from 398 flights
- 11 AM: 75.9% on time from 1,928 flights
- 12 PM: 76.9% on time from 812 flights
- 1 PM: 71.0% on time from 634 flights
- 2 PM: 65.8% on time from 576 flights
- 3 PM: 66.7% on time from 1,484 flights
- 4 PM: 63.9% on time from 373 flights
- 5 PM: 65.8% on time from 1,388 flights
- 6 PM: 66.8% on time from 1,140 flights
- 7 PM: 63.1% on time from 1,078 flights
- 8 PM: 66.9% on time from 397 flights
- 9 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why JFK → MIA runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for JFK → MIA. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on JFK → MIA, at 35.8%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 86.8% of the time and 6–9 PM departures 65.3%.
How this route holds up in bad weather
July 2023 – July 2026
Bad weather raises cancellations by a similar amount at both ends of JFK to MIA: 3.5 times the normal rate at JFK and 3.3 times at MIA. Cancelled in bad weather against normal hours: JFK 6.0% against 1.7%, MIA 4.5% against 1.3%. Flights that did leave MIA in bad weather arrived on time 50.6% of the time, against 74.1% in normal hours.
Bad weather and normal hours at the airports
Scheduled departures, July 2023 – July 2026| Departures from | JFK | MIA |
|---|---|---|
| Cancelled in bad weather | 6.0% | 4.5% |
| Cancelled in normal hours | 1.7% | 1.3% |
| Arrived on time, bad weather | 64.1% | 50.6% |
| Arrived on time, normal hours | 79.7% | 74.1% |
| Departures in bad weather | 46,497 | 15,746 |
Delta Air Lines (4.0% cancelled against 6.9% for the other carriers at JFK), American Airlines (4.6% cancelled against 6.6% for the other carriers at JFK) and Frontier Airlines (4.6% cancelled against 6.5% for the other carriers at JFK) cancelled fewer departures from JFK in bad weather than the other carriers there did in the same months. None of the route’s other carriers was clearly worse.
This route’s airlines in bad weather at JFK
All departures from JFK| Airline | Bad-weather departures | Cancelled | Other carriers |
|---|---|---|---|
| Delta Air Lines | 12,657 | 4.0%below the others | 6.9% |
| American Airlines | 6,152 | 4.6%below the others | 6.6% |
| Frontier Airlines | 672 | 4.6%below the others | 6.5% |
| JetBlue | 14,948 | 6.2%about level | 6.2% |
These are airport figures, not route figures: every scheduled departure from JFK and MIA, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from JFK on every route.
Weather source and limits. In full: JFK (airlines), MIA, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| American Airlines | 8,716 | 77.4% | 2.02% | -8 min | 9.3% |
| Delta Air Lines | 4,868 | 74.9% | 1.93% | -8 min | 9.7% |
| JetBlue | 1,899 | 63.9% | 2.90% | 1 min | 16.5% |
| Frontier Airlines | 350 | 75.1% | 2.00% | -8 min | 9.6% |
American Airlines flew 55.0% of the 15,833 flights listed.
American Airlines arrived on time 13.5 percentage points more often than JetBlue on this route.
Other ways to fly New York to Miami
Airport pairs in the same two city markets, as the DOT defines them.
| Route | Flights | On time | Cancelled | Median delay | Score |
|---|---|---|---|---|---|
| LGA→MIA New York to Miami | 17,949 | 74.0% | 2.69% | -8 min | 46 |
| JFK→MIA this route New York to Miami | 15,837 | 75.0% | 2.10% | -7 min | 51 |
| EWR→FLL Newark to Fort Lauderdale | 15,393 | 75.3% | 2.81% | -8 min | 49 |
| LGA→FLL New York to Fort Lauderdale | 14,072 | 72.5% | 2.86% | -6 min | 43 |
| EWR→MIA Newark to Miami | 12,777 | 75.7% | 2.65% | -8 min | 51 |
| JFK→FLL New York to Fort Lauderdale | 11,955 | 72.5% | 2.76% | -6 min | 45 |
EWR → MIA is the most reliable pairing for this journey at 75.7% on time, against 72.5% for LGA → FLL.
Flying to MIA from the New York area? Compare JFK, LGA, EWR for MIA, with the same test for what counts as a real difference.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
DL1528 (7:00 AM) arrived on time 86.3% of the time, 22.7 points more often than DL1428 (7:55 PM) at 63.6%.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 9.5 percentage points.
By month
- Jan: 73.6%
- Feb: 76.0%
- Mar: 74.2%
- Apr: 82.1%
- May: 79.1%
- Jun: 71.0%
- Jul: 62.5%
- Aug: 71.3%
- Sep: 76.7%
- Oct: 81.6%
- Nov: 83.9%
- Dec: 69.9%
July is historically the weakest month and November the strongest, a spread of 21.4 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 57.2% from 465 flights
- August 2023: 73.6% from 479 flights
- September 2023: 68.4% from 444 flights
- October 2023: 82.7% from 412 flights
- November 2023: 83.0% from 442 flights
- December 2023: 72.9% from 466 flights
- January 2024: 71.0% from 471 flights
- February 2024: 78.3% from 471 flights
- March 2024: 71.9% from 531 flights
- April 2024: 80.7% from 497 flights
- May 2024: 78.1% from 469 flights
- June 2024: 72.0% from 432 flights
- July 2024: 68.3% from 433 flights
- August 2024: 64.8% from 430 flights
- September 2024: 82.8% from 409 flights
- October 2024: 88.9% from 434 flights
- November 2024: 88.6% from 447 flights
- December 2024: 65.1% from 449 flights
- January 2025: 73.7% from 451 flights
- February 2025: 73.2% from 432 flights
- March 2025: 74.1% from 481 flights
- April 2025: 79.0% from 489 flights
- May 2025: 75.4% from 463 flights
- June 2025: 62.0% from 414 flights
- July 2025: 63.6% from 397 flights
- August 2025: 75.3% from 375 flights
- September 2025: 79.8% from 359 flights
- October 2025: 72.0% from 372 flights
- November 2025: 79.5% from 405 flights
- December 2025: 72.0% from 396 flights
- January 2026: 77.0% from 382 flights
- February 2026: 76.6% from 339 flights
- March 2026: 77.9% from 362 flights
- April 2026: 87.6% from 406 flights
- May 2026: 84.7% from 400 flights
- June 2026: 79.9% from 360 flights
- July 2026: 61.0% from 373 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 77.0% against 74.4% in the 12 months before — improving by 2.6 percentage points.
Data and methodology
Calculated by FlyerIntel from 15,837 JFK → MIA flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed