DL 5819 then DL 5665 at Boston
New York LaGuardia → Boston → Richmond
Timetable, Boston time
17:25DL 5819 from New York LaGuardia at the gate
15:20DL 5665 to Richmond leaves the gate
21 h 55 apart on the timetable, overnight
DL 5665 leaves 21 h 55 after DL 5819 arrives on the timetable: more than half a day, so not a connection we count.