DL 1223 then DL 1102 at Atlanta
Cincinnati → Atlanta → St Louis
Timetable, Atlanta time
16:33DL 1223 from Cincinnati at the gate
12:40DL 1102 to St Louis leaves the gate
20 h 07 apart on the timetable, overnight
DL 1102 leaves 20 h 07 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.