UA 3902 then AA 1696 at O'Hare
Rio De Janeiro → Chicago → Atlanta
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
11:20AA 1696 to Atlanta leaves the gate
18 h 19 apart on the timetable, overnight
AA 1696 leaves 18 h 19 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.