DL 9970 then UA 785 at San Francisco
Seattle → San Francisco → Washington
Timetable, San Francisco time
11:15DL 9970 from Seattle at the gate
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
19 h apart on the timetable, overnight
UA 785 leaves 19 h after DL 9970 arrives on the timetable: more than half a day, so not a connection we count.