AA 9950 then AA 2735 at O'Hare
Philadelphia → Chicago → Sacramento
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
11:10AA 2735 to Sacramento leaves the gate
21 h 21 apart on the timetable, overnight
AA 2735 leaves 21 h 21 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.