UA 2400 then VA 8085 at San Francisco
Boston → San Francisco → Houston
Timetable, San Francisco time
21:50UA 2400 from Boston at the gatealso VA 8312, NZ 9024, OZ 9530
16:40VA 8085 to Houston leaves the gatealso OZ 9521
18 h 50 apart on the timetable, overnight
VA 8085 leaves 18 h 50 after UA 2400 arrives on the timetable: more than half a day, so not a connection we count.