AA 3503 then K4 221 at O'Hare
Northwest Arkansas → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
20:00AA 3503 from Northwest Arkansas at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
14 h 35 apart on the timetable, overnight
K4 221 leaves 14 h 35 after AA 3503 arrives on the timetable: more than half a day, so not a connection we count.