UA 3902 then AA 793 at O'Hare
Rio De Janeiro → Chicago → Phoenix
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
10:10AA 793 to Phoenix leaves the gate
17 h 09 apart on the timetable, overnight
AA 793 leaves 17 h 09 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.