MIA to JAX flight delays
Miami, FL (MIA) Jacksonville, FL (JAX) · 335 miles
1,526 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
74.07%
Arrived on time
Within 15 minutes of schedule
0.85%
Cancelled
Share of scheduled flights
62 min
When late, late by
Average across delayed arrivals
17 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Envoy Air arrived on time 19.1 points more often than American Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In November it ran 21.5 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. JAX to MIA arrives on time 6.4 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Miami to Jacksonville run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over January 2025 – August 2026, Envoy Air arrived on time most often on MIA to JAX. American Airlines was late most often. Flights ran closest to schedule in November and worst in July.
Every airline on MIA to JAX
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| American Airlines | 805 | 65.24% | 0.99% | 67 min | F |
| Envoy Air | 701 | 84.32% | 0.71% | 49 min | B |
| Republic Airways | 20 | 70% | 0% | 63 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
JAX to MIA Jacksonville back to Miami 80.45% on time COther routes from Miami
Common questions
Are flights from Miami to Jacksonville usually delayed?
74.07% of flights on the MIA to JAX route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Miami to Jacksonville?
Envoy Air, at 84.32% on time across 701 flights. The least punctual on the route was American Airlines at 65.24%.
How often are MIA to JAX flights cancelled?
0.85% of scheduled flights did not operate — about 9 in every thousand. That is in the normal range.
What is the best month to fly Miami to Jacksonville?
November, when 86.6% of flights arrived on time. The worst was July at 65.1%.
When MIA to JAX flights are late, how late are they?
About 62 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on MIA to JAX during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →