UA 1007 then AC 4579 at San Francisco
Denver → San Francisco → Tucson
Timetable, San Francisco time
19:11UA 1007 from Denver at the gatealso AC 5293, VA 8351, NZ 9065
08:22AC 4579 to Tucson leaves the gatealso UA 5433, NZ 9749
13 h 11 apart on the timetable, overnight
AC 4579 leaves 13 h 11 after UA 1007 arrives on the timetable: more than half a day, so not a connection we count.