UA 4229 then UA 3752 at Dulles
Columbia → Washington → Lafayette Purdue University
Timetable, Washington time
16:25UA 4229 from Columbia at the gate
12:05UA 3752 to Lafayette Purdue University leaves the gate
19 h 40 apart on the timetable, overnight
UA 3752 leaves 19 h 40 after UA 4229 arrives on the timetable: more than half a day, so not a connection we count.