AA 9950 then AA 3134 at O'Hare
Philadelphia → Chicago → San Diego
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
10:04AA 3134 to San Diego leaves the gate
20 h 15 apart on the timetable, overnight
AA 3134 leaves 20 h 15 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.