DL 5604 then DL 5854 at Boston
Memphis → Boston → New York LaGuardia
Timetable, Boston time
13:38DL 5604 from Memphis at the gate
12:00DL 5854 to New York LaGuardia leaves the gate
22 h 22 apart on the timetable, overnight
DL 5854 leaves 22 h 22 after DL 5604 arrives on the timetable: more than half a day, so not a connection we count.