UA 3902 then AA 5580 at O'Hare
Rio De Janeiro → Chicago → Knoxville
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
08:12AA 5580 to Knoxville leaves the gate
15 h 11 apart on the timetable, overnight
AA 5580 leaves 15 h 11 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.