DL 5604 then AA 2764 at Boston
Memphis → Boston → Miami (MIA)
Timetable, Boston time
13:35DL 5604 from Memphis at the gate
11:10AA 2764 to Miami (MIA) leaves the gate
21 h 35 apart on the timetable, overnight
AA 2764 leaves 21 h 35 after DL 5604 arrives on the timetable: more than half a day, so not a connection we count.