UA 2866 then VA 8085 at San Francisco
Chicago O'Hare → San Francisco → Houston
Timetable, San Francisco time
19:28UA 2866 from Chicago O'Hare at the gate
16:40VA 8085 to Houston leaves the gate
21 h 12 apart on the timetable, overnight
VA 8085 leaves 21 h 12 after UA 2866 arrives on the timetable: more than half a day, so not a connection we count.