LA 6139 then CM 1473 at San Francisco
Boston → San Francisco → Sacramento
Timetable, San Francisco time
23:58LA 6139 from Boston at the gate
22:49CM 1473 to Sacramento leaves the gatealso UA 1848, VA 8262, LH 8884
22 h 51 apart on the timetable, overnight
CM 1473 leaves 22 h 51 after LA 6139 arrives on the timetable: more than half a day, so not a connection we count.