LX 72 then UA 3752 at Dulles
Zurich → Washington → Lafayette Purdue University
Timetable, Washington time
17:00LX 72 from Zurich at the gate
12:05UA 3752 to Lafayette Purdue University leaves the gate
19 h 05 apart on the timetable, overnight
UA 3752 leaves 19 h 05 after LX 72 arrives on the timetable: more than half a day, so not a connection we count.