Miami (MIA) to Jacksonville (JAX): On-Time Performance
Data through July 2026
Miami (MIA) to Jacksonville (JAX) effectively runs on two schedules. In November 2025, 87% of arrivals were on time; in July 2026 that fell to 57% — a 30-point seasonal swing. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (92% vs 67%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 4.1
- last 12 months
- Duration
- 1h 24m
- scheduled
- Distance
- 335 mi
Best airline from MIA to JAX
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 84% | 10 min | 1.0% | 1,538 |
| American Airlines | 67% | 26 min | 1.9% | 1,993 |
Monthly on-time trend
Best time to fly from MIA to JAX
Aim for departures around 8 a.m. (95% on-time); avoid 6 p.m. departures (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 18 min |
| Tuesdaybest | 80% | 11 min |
| Wednesday | 79% | 14 min |
| Thursday | 74% | 22 min |
| Friday | 72% | 19 min |
| Saturday | 74% | 19 min |
| Sunday | 66% | 28 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft43%
- Airline operations32%
- National airspace system17%
- Weather7%
Frequently asked questions
- How often are flights from MIA to JAX delayed?
- 26% of MIA–JAX flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from MIA to JAX?
- Envoy Air has the best on-time record on this route at 84%, based on 1,538 flights. 2 airlines flew MIA–JAX frequently enough to compare in this period.
- What is the best time of day to fly from MIA to JAX?
- Departures around 8 a.m. have the best record (95% on-time), while departures around 6 p.m. have the worst (60%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to JAX?
- The scheduled MIA–JAX flight time averages 1h 24m over 335 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are MIA to JAX flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from MIA to JAX?
- July 2026 was the roughest month in this dataset, with only 57% of arrivals on time. The best was November 2025 at 87%. If your dates are flexible, that 30-point gap is worth planning around.
Explore related pages
More routes from MIA
Other ways to fly to Jacksonville (JAX)
Related guides
Based on 3,558 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.