AA 3186 then B6 733 at Boston
Philadelphia → Boston → San Francisco
Timetable, Boston time
14:37AA 3186 from Philadelphia at the gate
13:30B6 733 to San Francisco leaves the gate
22 h 53 apart on the timetable, overnight
B6 733 leaves 22 h 53 after AA 3186 arrives on the timetable: more than half a day, so not a connection we count.