B6 733 then AC 4579 at San Francisco
Boston → San Francisco → Tucson
Timetable, San Francisco time
19:35B6 733 from Boston at the gatealso EY 8330
08:22AC 4579 to Tucson leaves the gatealso UA 5433, NZ 9749
12 h 47 apart on the timetable, overnight
AC 4579 leaves 12 h 47 after B6 733 arrives on the timetable: more than half a day, so not a connection we count.