Best Time to Fly MIA to JAX: On-Time Stats by Hour & Airline
Miami International → Jacksonville International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.6% of Miami (MIA) to Jacksonville (JAX) flights arrived on time (1,494 scheduled flights). That is 4.1 points below the national average of 77.6%.
Among 2 airlines, Envoy Air led with 82.4% on time and American Airlines was last with 65.2%.
Over 24 months, Tuesday was the most reliable day (82% on time) and July the worst month (61%).
The cancellation rate was 0.7% (US average 1.8%).
MIA to JAX 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 |
|---|---|---|---|---|
| Envoy Air | 82.4% | 52 min | 0.6% | 717 |
| American Airlines | 65.2% | 69 min | 0.8% | 757 |
| Republic Airways | Limited data | 20 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to JAX
On-time arrival % by scheduled departure hour (local time), 3,403 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 7am–8am | 87.7% | 1.4% | 74 |
| 8am–9am | 95.7% | 0.7% | 563 |
| 9am–10am | 85.4% | 1.5% | 132 |
| 10am–11am | 82.2% | 2.2% | 46 |
| 12pm–1pm | Limited data | 19 | |
| 1pm–2pm | 80.6% | 1.4% | 209 |
| 2pm–3pm | 77.9% | 2.4% | 167 |
| 3pm–4pm | 70.7% | 1.4% | 209 |
| 4pm–5pm | 61.7% | 0.0% | 120 |
| 5pm–6pm | 68.2% | 2.8% | 580 |
| 6pm–7pm | 67.4% | 4.3% | 93 |
| 7pm–8pm | 76.5% | 1.2% | 82 |
| 8pm–9pm | 71.4% | 0.0% | 266 |
| 9pm–10pm | 76.2% | 0.0% | 143 |
| 10pm–11pm | 63.6% | 1.4% | 699 |
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 JAX
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% | +12.3 pts | 1.4% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.2% | -2.5 pts | 0.7% | 138 |
| Summer peak (Jun 15 - Aug 15) | 61.6% | -16.0 pts | 2.5% | 566 |
| All other days | 77.7% | — | 1.3% | 2,628 |
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).