AV 562 then UA 3906 at San Francisco
Santa Clara → San Francisco → Washington
Timetable, San Francisco time
11:55AV 562 from Santa Clara at the gate
07:00UA 3906 to Washington leaves the gate
19 h 05 apart on the timetable, overnight
UA 3906 leaves 19 h 05 after AV 562 arrives on the timetable: more than half a day, so not a connection we count.