AA 9950 then AA 3436 at O'Hare
Philadelphia → Chicago → Rochester (ROC)
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
11:55AA 3436 to Rochester (ROC) leaves the gate
22 h 06 apart on the timetable, overnight
AA 3436 leaves 22 h 06 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.