UA 350 then AA 9950 at Philadelphia
Chicago O'Hare → Philadelphia → Chicago O'Hare
Timetable, Philadelphia time
14:17UA 350 from Chicago O'Hare at the gate
13:01AA 9950 to Chicago O'Hare leaves the gate
22 h 44 apart on the timetable, overnight
AA 9950 leaves 22 h 44 after UA 350 arrives on the timetable: more than half a day, so not a connection we count.