UA 3902 then AA 1682 at O'Hare
Rio De Janeiro → Chicago → Miami
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
08:15AA 1682 to Miami leaves the gate
15 h 14 apart on the timetable, overnight
AA 1682 leaves 15 h 14 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.