ATL (Atlanta) to MIA (Miami) flights arrive on time 77% of the time. The most reliable airline on this route is Delta Air Lines at 80%. The average delay is 45 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.ATL → MIA
ATL (Atlanta) to MIA (Miami)
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ATL → MIA on-time performance by month
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This route is on time most of the time. About 77% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Airlines are roughly equal on this route — Delta Air Lines leads slightly at 80% vs Southwest Airlines at 77%.
Airline Comparison
Delta Air Lines leads at 80% on time; Southwest Airlines trails at 77%.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.