UA 3902 then AA 6246 at O'Hare
Rio De Janeiro → Chicago → Nashville
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
15:05AA 6246 to Nashville leaves the gate
22 h 04 apart on the timetable, overnight
AA 6246 leaves 22 h 04 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.