AA 642 then AA 2156 at Miami
New York JFK → Miami → Atlanta
Timetable, Miami time
17:08AA 642 from New York JFK at the gate
20:40AA 2156 to Atlanta leaves the gate
3 h 32 apart on the timetable
The last days
AA 642 and AA 2156 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.