AA 9950 then AA 5393 at O'Hare
Philadelphia → Chicago → Dayton
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
09:20AA 5393 to Dayton leaves the gate
19 h 31 apart on the timetable, overnight
AA 5393 leaves 19 h 31 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.