DL 1223 then DL 1189 at Atlanta
Cincinnati → Atlanta → Allentown
Timetable, Atlanta time
16:33DL 1223 from Cincinnati at the gate
15:16DL 1189 to Allentown leaves the gate
22 h 43 apart on the timetable, overnight
DL 1189 leaves 22 h 43 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.