B6 2064 then DL 5665 at Boston
Key West → Boston → Richmond
Timetable, Boston time
16:45B6 2064 from Key West at the gate
15:35DL 5665 to Richmond leaves the gate
22 h 50 apart on the timetable, overnight
DL 5665 leaves 22 h 50 after B6 2064 arrives on the timetable: more than half a day, so not a connection we count.