MIA to ATL flight delays
Miami, FL (MIA) Atlanta, GA (ATL) · 594 miles
6,223 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
73.67%
Arrived on time
Within 15 minutes of schedule
1.41%
Cancelled
Share of scheduled flights
80 min
When late, late by
Average across delayed arrivals
22 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 10.7 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.
This is one of the heavily flown routes in the record — 6,223 flights in the period. Frequency is itself a form of insurance: when a flight goes wrong there is another one within hours, which is not true of the thin routes elsewhere on this site.
Flights from Miami to Atlanta 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 ATL. American Airlines was late most often. Flights ran closest to schedule in October and worst in July.
Every airline on MIA to ATL
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 |
|---|---|---|---|---|---|
| Delta Air Lines | 3,300 | 76.73% | 1.39% | 83 min | C |
| American Airlines | 1,524 | 67.55% | 0.79% | 82 min | D |
| Frontier Airlines | 861 | 71.8% | 1.86% | 79 min | D |
| Spirit Airlines | 269 | 74.42% | 4.09% | 71 min | D |
| Envoy Air | 225 | 78.28% | 1.33% | 47 min | C |
| Republic Airways | 44 | 65.91% | 0% | 60 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
ATL to MIA Atlanta back to Miami 71.02% on time DOther routes from Miami
Common questions
Are flights from Miami to Atlanta usually delayed?
73.67% of flights on the MIA to ATL route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airline is most on time from Miami to Atlanta?
Envoy Air, at 78.28% on time across 225 flights. The least punctual on the route was American Airlines at 67.55%.
How often are MIA to ATL flights cancelled?
1.41% of scheduled flights did not operate — about 14 in every thousand. That is in the normal range.
What is the best month to fly Miami to Atlanta?
October, when 78.6% of flights arrived on time. The worst was July at 61.8%.
When MIA to ATL flights are late, how late are they?
About 80 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 ATL 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 →