UA 3902 then AA 775 at O'Hare
Rio De Janeiro → Chicago → Washington National
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
09:50AA 775 to Washington National leaves the gate
16 h 49 apart on the timetable, overnight
AA 775 leaves 16 h 49 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.