DL 686 then DL 1596 at Atlanta
Savannah → Atlanta → Tri-Cities
Timetable, Atlanta time
09:20DL 686 from Savannah at the gate
21:23DL 1596 to Tri-Cities leaves the gate
12 h 03 apart on the timetable
DL 1596 leaves 12 h 03 after DL 686 arrives on the timetable: more than half a day, so not a connection we count.