UA 885 then UA 3752 at Dulles
Rome → Washington → Lafayette Purdue University
Timetable, Washington time
15:05UA 885 from Rome at the gate
12:05UA 3752 to Lafayette Purdue University leaves the gate
21 h apart on the timetable, overnight
UA 3752 leaves 21 h after UA 885 arrives on the timetable: more than half a day, so not a connection we count.