DL 1223 then DL 2020 at Atlanta
Cincinnati → Atlanta → Oklahoma City
Timetable, Atlanta time
16:33DL 1223 from Cincinnati at the gate
11:20DL 2020 to Oklahoma City leaves the gate
18 h 47 apart on the timetable, overnight
DL 2020 leaves 18 h 47 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.