B6 2454 then DL 5829 at Boston
Washington National → Boston → Newark
Timetable, Boston time
12:05B6 2454 from Washington National at the gate
12:00DL 5829 to Newark leaves the gate
23 h 55 apart on the timetable, overnight
DL 5829 leaves 23 h 55 after B6 2454 arrives on the timetable: more than half a day, so not a connection we count.