UA 3902 then AA 6291 at O'Hare
Rio De Janeiro → Chicago → Oklahoma City
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
10:00AA 6291 to Oklahoma City leaves the gate
16 h 59 apart on the timetable, overnight
AA 6291 leaves 16 h 59 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.