DL 4916 then DL 5595 at JFK
Nashville → New York → Washington
Timetable, New York time
10:52DL 4916 from Nashville at the gate
10:25DL 5595 to Washington leaves the gate
23 h 33 apart on the timetable, overnight
DL 5595 leaves 23 h 33 after DL 4916 arrives on the timetable: more than half a day, so not a connection we count.