UA 3902 then AA 4757 at O'Hare
Rio De Janeiro → Chicago → Pittsburgh
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
09:46AA 4757 to Pittsburgh leaves the gate
16 h 45 apart on the timetable, overnight
AA 4757 leaves 16 h 45 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.