QR 31 then UA 751 at O'Hare
Milan → Chicago → Portland (Oregon)
Timetable, Chicago time
11:14QR 31 from Milan at the gate
09:00UA 751 to Portland (Oregon) leaves the gate
21 h 46 apart on the timetable, overnight
UA 751 leaves 21 h 46 after QR 31 arrives on the timetable: more than half a day, so not a connection we count.