DL 1223 then DL 1507 at Atlanta
Cincinnati → Atlanta → Tri-Cities
Timetable, Atlanta time
16:30DL 1223 from Cincinnati at the gate
11:59DL 1507 to Tri-Cities leaves the gate
19 h 29 apart on the timetable, overnight
DL 1507 leaves 19 h 29 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.