DL 5653 then B6 177 at Boston
Columbus (Ohio) → Boston → Las Vegas
Timetable, Boston time
19:42DL 5653 from Columbus (Ohio) at the gate
17:20B6 177 to Las Vegas leaves the gate
21 h 38 apart on the timetable, overnight
B6 177 leaves 21 h 38 after DL 5653 arrives on the timetable: more than half a day, so not a connection we count.