UA 6047 then AA 2869 at O'Hare
Pittsburgh → Chicago → Phoenix
Timetable, Chicago time
20:31UA 6047 from Pittsburgh at the gate
17:29AA 2869 to Phoenix leaves the gate
20 h 58 apart on the timetable, overnight
AA 2869 leaves 20 h 58 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.