F9 4409 then DL 1596 at Atlanta
Washington → Atlanta → Tri-Cities
Timetable, Atlanta time
23:13F9 4409 from Washington at the gate
21:23DL 1596 to Tri-Cities leaves the gate
22 h 10 apart on the timetable, overnight
DL 1596 leaves 22 h 10 after F9 4409 arrives on the timetable: more than half a day, so not a connection we count.