UA 229 then UA 4548 at Dulles
Dublin → Washington → Cleveland
Timetable, Washington time
15:20UA 229 from Dublin at the gate
12:50UA 4548 to Cleveland leaves the gate
21 h 30 apart on the timetable, overnight
UA 4548 leaves 21 h 30 after UA 229 arrives on the timetable: more than half a day, so not a connection we count.