AA 1603 then B6 733 at Boston
Philadelphia → Boston → San Francisco
Timetable, Boston time
14:35AA 1603 from Philadelphia at the gate
13:30B6 733 to San Francisco leaves the gate
22 h 55 apart on the timetable, overnight
B6 733 leaves 22 h 55 after AA 1603 arrives on the timetable: more than half a day, so not a connection we count.