AZ 4418 then VA 8085 at San Francisco
Washington → San Francisco → Houston
Timetable, San Francisco time
19:24AZ 4418 from Washington at the gate
16:40VA 8085 to Houston leaves the gate
21 h 16 apart on the timetable, overnight
VA 8085 leaves 21 h 16 after AZ 4418 arrives on the timetable: more than half a day, so not a connection we count.