DL 1223 then DL 360 at Atlanta
Cincinnati → Atlanta → Washington National
Timetable, Atlanta time
16:33DL 1223 from Cincinnati at the gate
13:15DL 360 to Washington National leaves the gate
20 h 42 apart on the timetable, overnight
DL 360 leaves 20 h 42 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.