UA 3902 then AA 2742 at O'Hare
Rio De Janeiro → Chicago → Charlotte
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
09:00AA 2742 to Charlotte leaves the gate
15 h 59 apart on the timetable, overnight
AA 2742 leaves 15 h 59 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.