DL 5710 then DL 675 at Boston
Washington National → Boston → Kansas City
Timetable, Boston time
07:38DL 5710 from Washington National at the gate
06:15DL 675 to Kansas City leaves the gate
22 h 37 apart on the timetable, overnight
DL 675 leaves 22 h 37 after DL 5710 arrives on the timetable: more than half a day, so not a connection we count.