DL 5653 then B6 715 at Boston
Columbus (Ohio) → Boston → Buffalo
Timetable, Boston time
19:42DL 5653 from Columbus (Ohio) at the gate
18:59B6 715 to Buffalo leaves the gate
23 h 17 apart on the timetable, overnight
B6 715 leaves 23 h 17 after DL 5653 arrives on the timetable: more than half a day, so not a connection we count.