AA 9950 then AA 2604 at O'Hare
Philadelphia → Chicago → Austin
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
13:28AA 2604 to Austin leaves the gate
23 h 39 apart on the timetable, overnight
AA 2604 leaves 23 h 39 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.