LX 72 then UA 4548 at Dulles
Zurich → Washington → Cleveland
Timetable, Washington time
17:00LX 72 from Zurich at the gate
12:50UA 4548 to Cleveland leaves the gate
19 h 50 apart on the timetable, overnight
UA 4548 leaves 19 h 50 after LX 72 arrives on the timetable: more than half a day, so not a connection we count.