UA 3902 then AA 879 at O'Hare
Rio De Janeiro → Chicago → Dallas-Fort Worth
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
16:53AA 879 to Dallas-Fort Worth leaves the gate
23 h 52 apart on the timetable, overnight
AA 879 leaves 23 h 52 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.