MIA to ATL flight delays & on-time performance
Nonstop flights from Miami International Airport to Hartsfield Jackson Atlanta International Airport · 594 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MIA or ATL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Miami (MIA) to Atlanta (ATL) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.6% were cancelled, and 10% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (77% on time); American Airlines was the least (67%).
- Departures scheduled around 6am did best (93% on time); around 6pm did worst (55%).
- Wednesday was the most reliable day to fly (82% 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 MIA to ATL?
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 |
|---|---|---|---|---|---|
| Envoy AirRegional airline operating American Eagle flights. | 79% | 1.3% | 11 min | 4.9% | 229 |
| Delta Air Lines | 77% | 1.8% | 19 min | 8.8% | 3,308 |
| Spirit Airlines | 75% | 4.4% | 18 min | 8.7% | 252 |
| Frontier Airlines | 70% | 1.8% | 26 min | 12.6% | 896 |
| American Airlines | 67% | 0.7% | 28 min | 13.4% | 1,532 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 66% | 0.0% | 21 min | 13.6% | 44 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am91%233 flights
- 6am93%390 flights
- 7am89%529 flights
- 8am86%634 flights
- 9am87%70 flights
- 10am84%416 flights
- 11am78%154 flights
- 12pm80%474 flights
- 1pm78%193 flights
- 2pm71%351 flights
- 3pm66%331 flights
- 4pm60%531 flights
- 5pm60%315 flights
- 6pm55%421 flights
- 7pm60%554 flights
- 8pm53%176 flights
- 9pm65%440 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%3.0% cancelled
- Tuesday80%0.6% cancelled
- Wednesday82%0.5% cancelled
- Thursday78%0.2% cancelled
- Friday73%1.4% cancelled
- Saturday68%2.5% cancelled
- Sunday62%2.7% 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)34%
- Air traffic control & airport congestion21%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)65%
- Extreme weather32%
- Air traffic control & airport congestion3%
- Security0%
MIA to ATL: common questions
- How often are MIA to ATL flights on time?
- 74% 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 Miami to Atlanta cancelled?
- 1.6% of scheduled flights were cancelled (99 of 6,261).
- 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 81 min behind schedule on average, and 10.4% of flights were an hour or more late.
- How long is taxi time at MIA?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ATL to MIA — 71% on time
More flights from Miami
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MIA → ATL, nonstop flights by US airlines that report to the DOT. How we calculate this.