AA 9950 then AA 4183 at O'Hare
Philadelphia → Chicago → Columbia Metropolitan
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
13:08AA 4183 to Columbia Metropolitan leaves the gate
23 h 19 apart on the timetable, overnight
AA 4183 leaves 23 h 19 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.