UA 3902 then AA 3634 at O'Hare
Rio De Janeiro → Chicago → La Crosse
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
10:30AA 3634 to La Crosse leaves the gate
17 h 29 apart on the timetable, overnight
AA 3634 leaves 17 h 29 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.