AA 4389 then B6 733 at Boston
Columbus (Ohio) → Boston → San Francisco
Timetable, Boston time
13:57AA 4389 from Columbus (Ohio) at the gate
13:30B6 733 to San Francisco leaves the gate
23 h 33 apart on the timetable, overnight
B6 733 leaves 23 h 33 after AA 4389 arrives on the timetable: more than half a day, so not a connection we count.