UA 3902 then AA 2361 at O'Hare
Rio De Janeiro → Chicago → Atlanta
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
08:50AA 2361 to Atlanta leaves the gate
15 h 49 apart on the timetable, overnight
AA 2361 leaves 15 h 49 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.