AA 2880 then K4 221 at O'Hare
Philadelphia → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
17:37AA 2880 from Philadelphia at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
16 h 58 apart on the timetable, overnight
K4 221 leaves 16 h 58 after AA 2880 arrives on the timetable: more than half a day, so not a connection we count.