UA 3902 then AA 3389 at O'Hare
Rio De Janeiro → Chicago → Columbia Regional
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
08:14AA 3389 to Columbia Regional leaves the gate
15 h 13 apart on the timetable, overnight
AA 3389 leaves 15 h 13 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.