UA 3902 then AA 1802 at O'Hare
Rio De Janeiro → Chicago → San Diego
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
10:03AA 1802 to San Diego leaves the gate
17 h 02 apart on the timetable, overnight
AA 1802 leaves 17 h 02 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.