DL 1223 then AA 2361 at Atlanta
Cincinnati → Atlanta → Chicago O'Hare
Timetable, Atlanta time
16:30DL 1223 from Cincinnati at the gate
12:51AA 2361 to Chicago O'Hare leaves the gate
20 h 21 apart on the timetable, overnight
AA 2361 leaves 20 h 21 after DL 1223 arrives on the timetable: more than half a day, so not a connection we count.