DL 1223 then DL 512 at Atlanta
Cincinnati Northern Kentucky → Atlanta → Dallas
Timetable, Atlanta time
16:33DL 1223 from Cincinnati Northern Kentucky at the gate
12:59DL 512 to Dallas leaves the gate
20 h 26 apart on the timetable, overnight
DL 512 leaves 20 h 26 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.