DL 5680 then DL 2586 at Boston
Pittsburgh → Boston → Nashville
Timetable, Boston time
20:47DL 5680 from Pittsburgh at the gate
20:15DL 2586 to Nashville leaves the gate
23 h 28 apart on the timetable, overnight
DL 2586 leaves 23 h 28 after DL 5680 arrives on the timetable: more than half a day, so not a connection we count.