DL 5592 then B6 9002 at Boston
Washington National → Boston → Bedford
Timetable, Boston time
15:21DL 5592 from Washington National at the gate
11:00B6 9002 to Bedford leaves the gate
19 h 39 apart on the timetable, overnight
B6 9002 leaves 19 h 39 after DL 5592 arrives on the timetable: more than half a day, so not a connection we count.