AA 9867 then K4 221 at O'Hare
Marquette → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
13:05AA 9867 from Marquette at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
21 h 30 apart on the timetable, overnight
K4 221 leaves 21 h 30 after AA 9867 arrives on the timetable: more than half a day, so not a connection we count.