AA 5480 then DL 5845 at Philadelphia
Memphis → Philadelphia → Boston
Timetable, Philadelphia time
10:26AA 5480 from Memphis at the gate
09:00DL 5845 to Boston leaves the gate
22 h 34 apart on the timetable, overnight
DL 5845 leaves 22 h 34 after AA 5480 arrives on the timetable: more than half a day, so not a connection we count.