MIA (Miami) to ATL (Atlanta) flights arrive on time 73% of the time. The most reliable airline on this route is Southwest Airlines at 81%. The average delay is 81 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated July 2026.MIA → ATL
MIA (Miami) to ATL (Atlanta)
MIA → ATL on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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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?
Southwest Airlines edges out American Airlines on this route — 81% vs 68% on time.
Airline Comparison
Southwest Airlines leads at 81% on time; American Airlines trails at 68%.
Accurate?
Good to know
Departing from MIA
76% on timeExpect ~20 min sitting on the taxiway after your gate pushes back. MIA has long runway queues.
TSA is currently ~29 min. Best time: 4 AM (about 5 min).
Arriving at ATL
80% on timeWhen flights into ATL are late, the average delay is 72 minutes. Build buffer if you have ground plans.
If connecting at ATL: TSA is ~30 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of MIA? 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.