UA 1812 then VA 8079 at San Francisco
Denver → San Francisco → Houston
Timetable, San Francisco time
15:12UA 1812 from Denver at the gatealso AC 3617, VA 8354, NZ 9071
12:00VA 8079 to Houston leaves the gatealso NZ 9195
20 h 48 apart on the timetable, overnight
VA 8079 leaves 20 h 48 after UA 1812 arrives on the timetable: more than half a day, so not a connection we count.