UA 225 then UA 796 at San Francisco
Philadelphia → San Francisco → Boston
Timetable, San Francisco time
21:43UA 225 from Philadelphia at the gatealso VA 8238, NZ 9366
21:30UA 796 to Boston leaves the gatealso VA 8308, NZ 9012
23 h 47 apart on the timetable, overnight
UA 796 leaves 23 h 47 after UA 225 arrives on the timetable: more than half a day, so not a connection we count.