UA 6047 then AA 4983 at O'Hare
Pittsburgh → Chicago → Detroit
Timetable, Chicago time
20:31UA 6047 from Pittsburgh at the gate
18:59AA 4983 to Detroit leaves the gate
22 h 28 apart on the timetable, overnight
AA 4983 leaves 22 h 28 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.