AA 818 then K4 221 at O'Hare
Charlotte → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
12:22AA 818 from Charlotte at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
22 h 13 apart on the timetable, overnight
K4 221 leaves 22 h 13 after AA 818 arrives on the timetable: more than half a day, so not a connection we count.