ATL to MIA flight delays & on-time performance
Nonstop flights from Hartsfield Jackson Atlanta International Airport to Miami International Airport · 594 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ATL or MIA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Atlanta (ATL) to Miami (MIA) arrived on time 71% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.6% were cancelled, and 11% arrived an hour or more late.
- American Airlines was the most punctual airline here (75% on time); Frontier Airlines was the least (64%).
- Departures scheduled around 7am did best (89% on time); around 8pm did worst (55%).
- Wednesday was the most reliable day to fly (81% on time) and Sunday the least (62%).
- The largest source of delay minutes was late-arriving aircraft (39%).
Which airline is most on time from ATL 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 | 75% | 0.8% | 23 min | 10.9% | 1,535 |
| Envoy AirRegional airline operating American Eagle flights. | 75% | 1.3% | 20 min | 7.0% | 231 |
| Spirit Airlines | 74% | 4.4% | 26 min | 13.3% | 252 |
| Delta Air Lines | 71% | 1.8% | 17 min | 8.7% | 3,306 |
| Frontier Airlines | 64% | 1.6% | 35 min | 17.9% | 900 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 64% | 0.0% | 26 min | 15.9% | 44 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am91%183 flights
- 6am88%181 flights
- 7am89%525 flights
- 8am80%539 flights
- 9am81%455 flights
- 10am77%395 flights
- 11am80%502 flights
- 12pm77%331 flights
- 1pm69%309 flights
- 2pm66%263 flights
- 3pm63%342 flights
- 4pm57%428 flights
- 5pm57%138 flights
- 6pm60%354 flights
- 7pm56%356 flights
- 8pm55%356 flights
- 9pm45%64 flights
- 10pm66%518 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday69%2.4% cancelled
- Tuesday80%0.8% cancelled
- Wednesday81%0.4% cancelled
- Thursday74%0.4% cancelled
- Friday70%1.2% cancelled
- Saturday66%2.5% cancelled
- Sunday62%3.1% 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 aircraft39%
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion19%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)64%
- Extreme weather33%
- Air traffic control & airport congestion3%
- Security0%
ATL to MIA: common questions
- How often are ATL to MIA flights on time?
- 71% 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 Atlanta to Miami cancelled?
- 1.6% of scheduled flights were cancelled (98 of 6,268).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 72 min behind schedule on average, and 10.7% of flights were an hour or more late.
- How long is taxi time at ATL?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MIA to ATL — 74% on time
More flights from Atlanta
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ATL → MIA, nonstop flights by US airlines that report to the DOT. How we calculate this.