Best Time to Fly MIA to JFK: On-Time Stats by Hour & Airline
Miami International → John F. Kennedy International
Data through July 2026 · Last updated October 18, 2026
4,530 flights were scheduled from Miami (MIA) to New York (JFK) in the last 12 months, and 71.9% of those that flew arrived on time, 5.8 points below the US average of 77.6%.
Frontier Airlines was the most punctual of the 3 airlines on the route at 80.3%, while American Airlines trailed at 70.7%.
September has been the best month (84% on time) and Sunday the weakest day of the week (65%).
2.8% of flights were cancelled, versus 1.8% nationally.
MIA to JFK on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlines | 80.3% | 112 min | 2.0% | 244 |
| Delta Air Lines | 72.5% | 75 min | 3.3% | 1,621 |
| American Airlines | 70.7% | 80 min | 2.6% | 2,665 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to JFK
On-time arrival % by scheduled departure hour (local time), 9,820 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 1 | |
| 6am–7am | 91.8% | 1.9% | 534 |
| 7am–8am | 90.9% | 1.1% | 1,382 |
| 8am–9am | 87.4% | 0.9% | 636 |
| 9am–10am | 86.5% | 1.8% | 393 |
| 10am–11am | 82.5% | 2.2% | 276 |
| 11am–12pm | 75.9% | 1.8% | 889 |
| 12pm–1pm | 83.4% | 1.0% | 298 |
| 1pm–2pm | 63.6% | 2.3% | 302 |
| 2pm–3pm | 68.3% | 2.2% | 403 |
| 3pm–4pm | 69.3% | 2.9% | 922 |
| 4pm–5pm | 58.2% | 4.6% | 413 |
| 5pm–6pm | 60.2% | 3.2% | 616 |
| 6pm–7pm | 54.5% | 3.2% | 438 |
| 7pm–8pm | 56.4% | 2.9% | 1,379 |
| 8pm–9pm | 52.2% | 2.6% | 114 |
| 9pm–10pm | 65.5% | 2.8% | 780 |
| 10pm–11pm | 81.8% | 0.0% | 44 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MIA to JFK
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 76.8% | +1.8 pts | 0.5% | 191 |
| Christmas & New Year (Dec 20 - Jan 3) | 59.0% | -16.0 pts | 2.7% | 401 |
| Summer peak (Jun 15 - Aug 15) | 64.0% | -11.1 pts | 6.0% | 1,560 |
| All other days | 75.1% | — | 1.6% | 7,668 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).