AA 9950 then UA 202 at O'Hare
Philadelphia → Chicago → Atlanta
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
09:00UA 202 to Atlanta leaves the gate
19 h 11 apart on the timetable, overnight
UA 202 leaves 19 h 11 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.