AA 3879 then AA 609 at Phoenix
Memphis → Phoenix → Miami
Timetable, Phoenix time
09:18AA 3879 from Memphis at the gate
13:37AA 609 to Miami leaves the gate
4 h 19 apart on the timetable
The last days
AA 3879 and AA 609 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.