UA 951 then UA 4548 at Dulles
Brussels → Washington → Cleveland
Timetable, Washington time
14:30UA 951 from Brussels at the gate
12:50UA 4548 to Cleveland leaves the gate
22 h 20 apart on the timetable, overnight
UA 4548 leaves 22 h 20 after UA 951 arrives on the timetable: more than half a day, so not a connection we count.