UA 6047 then AA 1645 at O'Hare
Pittsburgh → Chicago → Raleigh-Durham
Timetable, Chicago time
20:31UA 6047 from Pittsburgh at the gate
19:00AA 1645 to Raleigh-Durham leaves the gate
22 h 29 apart on the timetable, overnight
AA 1645 leaves 22 h 29 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.