DL 5653 then AA 4547 at Boston
Columbus (Ohio) → Boston → Washington National
Timetable, Boston time
19:42DL 5653 from Columbus (Ohio) at the gate
17:35AA 4547 to Washington National leaves the gate
21 h 53 apart on the timetable, overnight
AA 4547 leaves 21 h 53 after DL 5653 arrives on the timetable: more than half a day, so not a connection we count.