UA 3902 then AA 2036 at O'Hare
Rio De Janeiro → Chicago → Philadelphia
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
12:59AA 2036 to Philadelphia leaves the gate
19 h 58 apart on the timetable, overnight
AA 2036 leaves 19 h 58 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.