AA 3657 then K4 221 at O'Hare
Key West → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
16:00AA 3657 from Key West at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
18 h 35 apart on the timetable, overnight
K4 221 leaves 18 h 35 after AA 3657 arrives on the timetable: more than half a day, so not a connection we count.