AA 9950 then AA 4330 at O'Hare
Philadelphia → Chicago → Springfield (SPI)
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
13:28AA 4330 to Springfield (SPI) leaves the gate
23 h 39 apart on the timetable, overnight
AA 4330 leaves 23 h 39 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.