Best Time to Fly JAX to MIA: On-Time Stats by Hour & Airline
Jacksonville International → Miami International
Data through July 2026 · Last updated October 18, 2026
1,492 flights were scheduled from Jacksonville (JAX) to Miami (MIA) in the last 12 months, and 80.9% of those that flew arrived on time, 3.2 points above the US average of 77.6%.
Among 2 airlines, American Airlines led with 81.7% on time and Envoy Air was last with 80.1%.
Over 24 months, Wednesday was the most reliable day (85% on time) and August the worst month (72%).
The cancellation rate was 0.7% (US average 1.8%).
JAX to MIA 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 |
|---|---|---|---|---|
| American Airlines | 81.7% | 90 min | 0.8% | 755 |
| Envoy Air | 80.1% | 51 min | 0.6% | 717 |
| Republic Airways | Limited data | 20 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JAX to MIA
On-time arrival % by scheduled departure hour (local time), 3,401 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.7% | 0.0% | 69 |
| 6am–7am | 92.1% | 1.4% | 655 |
| 7am–8am | 85.6% | 0.2% | 460 |
| 8am–9am | 87.2% | 0.0% | 39 |
| 9am–10am | 86.4% | 0.6% | 355 |
| 10am–11am | 87.6% | 0.4% | 243 |
| 11am–12pm | 89.2% | 2.6% | 115 |
| 12pm–1pm | 77.8% | 2.0% | 101 |
| 1pm–2pm | Limited data | 9 | |
| 2pm–3pm | Limited data | 10 | |
| 3pm–4pm | 66.5% | 2.8% | 212 |
| 4pm–5pm | 74.2% | 1.2% | 161 |
| 5pm–6pm | 61.9% | 1.9% | 108 |
| 6pm–7pm | 65.8% | 0.6% | 160 |
| 7pm–8pm | 68.2% | 2.5% | 552 |
| 8pm–9pm | 67.6% | 4.6% | 152 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on JAX to MIA
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) | 90.0% | +8.5 pts | 1.4% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 81.6% | +0.2 pts | 0.7% | 137 |
| Summer peak (Jun 15 - Aug 15) | 72.5% | -9.0 pts | 2.8% | 566 |
| All other days | 81.5% | — | 1.3% | 2,627 |
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).