AA 3970 then K4 221 at O'Hare
Wilmington → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
13:51AA 3970 from Wilmington at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
20 h 44 apart on the timetable, overnight
K4 221 leaves 20 h 44 after AA 3970 arrives on the timetable: more than half a day, so not a connection we count.