AA 4400 then K4 221 at O'Hare
Memphis → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
16:25AA 4400 from Memphis at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
18 h 10 apart on the timetable, overnight
K4 221 leaves 18 h 10 after AA 4400 arrives on the timetable: more than half a day, so not a connection we count.