DL 1223 then AA 2910 at Atlanta
Cincinnati → Atlanta → Chicago O'Hare
Timetable, Atlanta time
16:33DL 1223 from Cincinnati at the gate
15:15AA 2910 to Chicago O'Hare leaves the gate
22 h 42 apart on the timetable, overnight
AA 2910 leaves 22 h 42 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.