UA 2647 then DL 5629 at Boston
San Francisco → Boston → Columbus (Ohio)
Timetable, Boston time
16:49UA 2647 from San Francisco at the gate
16:25DL 5629 to Columbus (Ohio) leaves the gate
23 h 36 apart on the timetable, overnight
DL 5629 leaves 23 h 36 after UA 2647 arrives on the timetable: more than half a day, so not a connection we count.