AA 607 then AA 3991 at Miami
New Orleans → Miami → Nashville
Timetable, Miami time
11:04AA 607 from New Orleans at the gate
14:25AA 3991 to Nashville leaves the gate
3 h 21 apart on the timetable
The last days
AA 607 and AA 3991 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.