UA 4067 then UA 3752 at Dulles
Louisville → Washington → Lafayette Purdue University
Timetable, Washington time
15:49UA 4067 from Louisville at the gate
12:05UA 3752 to Lafayette Purdue University leaves the gate
20 h 16 apart on the timetable, overnight
UA 3752 leaves 20 h 16 after UA 4067 arrives on the timetable: more than half a day, so not a connection we count.