SQ 34 then AC 4579 at San Francisco
Singapore → San Francisco → Tucson
Timetable, San Francisco time
18:35SQ 34 from Singapore at the gate
08:22AC 4579 to Tucson leaves the gatealso UA 5433, NZ 9749
13 h 47 apart on the timetable, overnight
AC 4579 leaves 13 h 47 after SQ 34 arrives on the timetable: more than half a day, so not a connection we count.