AC 3997 then UA 785 at San Francisco
Boise → San Francisco → Washington
Timetable, San Francisco time
09:23AC 3997 from Boise at the gatealso UA 4639, NH 7335
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
20 h 52 apart on the timetable, overnight
UA 785 leaves 20 h 52 after AC 3997 arrives on the timetable: more than half a day, so not a connection we count.