AA 880 then K4 221 at O'Hare
Philadelphia → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
12:19AA 880 from Philadelphia at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
22 h 16 apart on the timetable, overnight
K4 221 leaves 22 h 16 after AA 880 arrives on the timetable: more than half a day, so not a connection we count.