AA 9950 then AA 3575 at O'Hare
Philadelphia → Chicago → Springfield Branson National
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
11:20AA 3575 to Springfield Branson National leaves the gate
21 h 31 apart on the timetable, overnight
AA 3575 leaves 21 h 31 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.