UA 3902 then UA 751 at O'Hare
Rio De Janeiro → Chicago → Portland (Oregon)
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
09:05UA 751 to Portland (Oregon) leaves the gate
16 h 04 apart on the timetable, overnight
UA 751 leaves 16 h 04 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.