UA 3902 then UA 4608 at O'Hare
Rio De Janeiro → Chicago → Greenville-Spartanburg
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
10:34UA 4608 to Greenville-Spartanburg leaves the gate
17 h 33 apart on the timetable, overnight
UA 4608 leaves 17 h 33 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.