DL 5653 then DL 5667 at Boston
Columbus (Ohio) → Boston → Washington National
Timetable, Boston time
19:42DL 5653 from Columbus (Ohio) at the gate
18:00DL 5667 to Washington National leaves the gate
22 h 18 apart on the timetable, overnight
DL 5667 leaves 22 h 18 after DL 5653 arrives on the timetable: more than half a day, so not a connection we count.