AA 1366 then K4 221 at O'Hare
Denver → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
18:10AA 1366 from Denver at the gate
16:20K4 221 to Cincinnati Northern Kentucky leaves the gate
22 h 10 apart on the timetable, overnight
K4 221 leaves 22 h 10 after AA 1366 arrives on the timetable: more than half a day, so not a connection we count.