AA 572 then K4 221 at O'Hare
Dallas-Fort Worth → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
20:00AA 572 from Dallas-Fort Worth at the gate
16:20K4 221 to Cincinnati Northern Kentucky leaves the gate
20 h 20 apart on the timetable, overnight
K4 221 leaves 20 h 20 after AA 572 arrives on the timetable: more than half a day, so not a connection we count.