EI 123 then UA 5618 at O'Hare
Dublin → Chicago → Washington National
Timetable, Chicago time
14:10EI 123 from Dublin at the gate
14:00UA 5618 to Washington National leaves the gate
23 h 50 apart on the timetable, overnight
UA 5618 leaves 23 h 50 after EI 123 arrives on the timetable: more than half a day, so not a connection we count.