DL 5550 then B6 407 at Boston
Tallahassee → Boston → Nashville
Timetable, Boston time
15:59DL 5550 from Tallahassee at the gate
13:00B6 407 to Nashville leaves the gate
21 h 01 apart on the timetable, overnight
B6 407 leaves 21 h 01 after DL 5550 arrives on the timetable: more than half a day, so not a connection we count.