UA 358 then UA 3752 at Dulles
Dallas-Fort Worth → Washington → Lafayette
Timetable, Washington time
16:20UA 358 from Dallas-Fort Worth at the gate
12:05UA 3752 to Lafayette leaves the gate
19 h 45 apart on the timetable, overnight
UA 3752 leaves 19 h 45 after UA 358 arrives on the timetable: more than half a day, so not a connection we count.