UA 3902 then AA 2378 at O'Hare
Rio De Janeiro → Chicago → Dallas-Fort Worth
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
08:29AA 2378 to Dallas-Fort Worth leaves the gate
15 h 28 apart on the timetable, overnight
AA 2378 leaves 15 h 28 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.