AA 4757 then K4 221 at O'Hare
Pittsburgh → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
14:02AA 4757 from Pittsburgh at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
20 h 33 apart on the timetable, overnight
K4 221 leaves 20 h 33 after AA 4757 arrives on the timetable: more than half a day, so not a connection we count.