DL 9979 then DL 1549 at Atlanta
Detroit → Atlanta → Tallahassee
Timetable, Atlanta time
15:41DL 9979 from Detroit at the gate
13:12DL 1549 to Tallahassee leaves the gate
21 h 31 apart on the timetable, overnight
DL 1549 leaves 21 h 31 after DL 9979 arrives on the timetable: more than half a day, so not a connection we count.