DL 1007 then DL 1858 at Atlanta
Washington National → Atlanta → Cincinnati
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
21:20DL 1858 to Cincinnati leaves the gate
23 h 39 apart on the timetable, overnight
DL 1858 leaves 23 h 39 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.