UA 1561 then VA 8079 at San Francisco
Denver → San Francisco → Houston
Timetable, San Francisco time
13:12UA 1561 from Denver at the gatealso AC 3614, VA 8349, NZ 9074
12:00VA 8079 to Houston leaves the gatealso NZ 9195
22 h 48 apart on the timetable, overnight
VA 8079 leaves 22 h 48 after UA 1561 arrives on the timetable: more than half a day, so not a connection we count.