JAX to MIA flight delays & on-time performance
Nonstop flights from Jacksonville International Airport to Miami International Airport · 335 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at JAX or MIA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Jacksonville (JAX) to Miami (MIA) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.7% were cancelled, and 7% arrived an hour or more late.
- American Airlines was the most punctual airline here (82% on time); Envoy Air was the least (80%).
- Departures scheduled around 6am did best (91% on time); around 6pm did worst (61%).
- Wednesday was the most reliable day to fly (86% on time) and Sunday the least (72%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from JAX to MIA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 82% | 0.8% | 17 min | 7.6% | 755 |
| Envoy AirRegional airline operating American Eagle flights. | 80% | 0.6% | 11 min | 5.6% | 717 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 80% | 0.0% | 24 min | 15.0% | 20 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am91%345 flights
- 7am89%223 flights
- 8am87%38 flights
- 9am85%205 flights
- 10am85%99 flights
- 11am91%44 flights
- 3pm62%61 flights
- 4pm72%18 flights
- 5pm68%19 flights
- 6pm61%130 flights
- 7pm71%221 flights
- 8pm62%75 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday83%2.3% cancelled
- Tuesday81%0.5% cancelled
- Wednesday86%0.5% cancelled
- Thursday86%0.0% cancelled
- Friday79%0.5% cancelled
- Saturday81%0.5% cancelled
- Sunday72%0.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft43%
- Airline (crew, maintenance, cleaning, fueling)42%
- Air traffic control & airport congestion13%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion60%
- Extreme weather30%
- Airline (crew, maintenance, cleaning, fueling)10%
- Security0%
JAX to MIA: common questions
- How often are JAX to MIA flights on time?
- 81% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Jacksonville to Miami cancelled?
- 0.7% of scheduled flights were cancelled (10 of 1,492).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 71 min behind schedule on average, and 6.8% of flights were an hour or more late.
- How long is taxi time at JAX?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MIA to JAX — 74% on time
More flights from Jacksonville
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: JAX → MIA, nonstop flights by US airlines that report to the DOT. How we calculate this.