AA 5510 then DL 1596 at Atlanta
Washington National → Atlanta → Tri-Cities
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
21:23DL 1596 to Tri-Cities leaves the gate
22 h apart on the timetable, overnight
DL 1596 leaves 22 h after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.