ATL (Atlanta) to MIA (Miami) flights arrive on time 73% of the time. The most reliable airline on this route is null at 79%. The average delay is 76 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated July 2026.ATL → MIA
ATL (Atlanta) to MIA (Miami)
ATL → MIA on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 73% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
null is significantly more reliable on this route at 79% on time vs Frontier Airlines at 63%.
Airline Comparison
leads at 79% on time; Frontier Airlines trails at 63%.
Accurate?
Good to know
Departing from ATL
80% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. ATL has long runway queues.
TSA is currently ~31 min. Best time: 4 AM (about 5 min).
Arriving at MIA
76% on timeWhen flights into MIA are late, the average delay is 77 minutes. Build buffer if you have ground plans.
If connecting at MIA: TSA is ~17 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what owes you — refund rights, action plan, complaint email. Free.
Flying out of ATL? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated July 2026. Source: Bureau of Transportation Statistics.