UA 3902 then UA 2145 at O'Hare
Rio De Janeiro → Chicago → Sacramento
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
09:11UA 2145 to Sacramento leaves the gate
16 h 10 apart on the timetable, overnight
UA 2145 leaves 16 h 10 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.