UA 5402 then VA 8085 at San Francisco
Seattle → San Francisco → Houston
Timetable, San Francisco time
21:52UA 5402 from Seattle at the gatealso NZ 9422
16:40VA 8085 to Houston leaves the gatealso OZ 9521
18 h 48 apart on the timetable, overnight
VA 8085 leaves 18 h 48 after UA 5402 arrives on the timetable: more than half a day, so not a connection we count.