UA 4367 then UA 228 at Dulles
Rochester → Washington → Dublin
Timetable, Washington time
11:54UA 4367 from Rochester at the gate
00:12UA 228 to Dublin leaves the gate
12 h 18 apart on the timetable, overnight
UA 228 leaves 12 h 18 after UA 4367 arrives on the timetable: more than half a day, so not a connection we count.