DL 2925 then DL 5508 at Atlanta
Mobile → Atlanta → Tri-Cities
Timetable, Atlanta time
20:35DL 2925 from Mobile at the gate
17:20DL 5508 to Tri-Cities leaves the gate
20 h 45 apart on the timetable, overnight
DL 5508 leaves 20 h 45 after DL 2925 arrives on the timetable: more than half a day, so not a connection we count.