UA 1799 then VA 8079 at San Francisco
Las Vegas → San Francisco → Houston
Timetable, San Francisco time
15:19UA 1799 from Las Vegas at the gatealso CM 1893, AC 3109, VA 8512, NZ 9235
12:00VA 8079 to Houston leaves the gatealso NZ 9195
20 h 41 apart on the timetable, overnight
VA 8079 leaves 20 h 41 after UA 1799 arrives on the timetable: more than half a day, so not a connection we count.