UA 3902 then AA 1207 at O'Hare
Rio De Janeiro → Chicago → Dallas-Fort Worth
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
15:52AA 1207 to Dallas-Fort Worth leaves the gate
22 h 51 apart on the timetable, overnight
AA 1207 leaves 22 h 51 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.