DL 1159 then DL 5676 at Boston
Las Vegas → Boston → Richmond
Timetable, Boston time
19:25DL 1159 from Las Vegas at the gate
18:10DL 5676 to Richmond leaves the gate
22 h 45 apart on the timetable, overnight
DL 5676 leaves 22 h 45 after DL 1159 arrives on the timetable: more than half a day, so not a connection we count.