UA 4510 then UA 3752 at Dulles
Richmond → Washington → Lafayette Purdue University
Timetable, Washington time
16:05UA 4510 from Richmond at the gate
12:05UA 3752 to Lafayette Purdue University leaves the gate
20 h apart on the timetable, overnight
UA 3752 leaves 20 h after UA 4510 arrives on the timetable: more than half a day, so not a connection we count.