FR 815 then UA 229 at Dublin
Edinburgh → Dublin → Washington
Timetable, Dublin time
15:35FR 815 from Edinburgh at the gate
12:05UA 229 to Washington leaves the gate
20 h 30 apart on the timetable, overnight
UA 229 leaves 20 h 30 after FR 815 arrives on the timetable: more than half a day, so not a connection we count.