DL 2919 then CM 1472 at San Francisco
Boston → San Francisco → Seattle
Timetable, San Francisco time
23:58DL 2919 from Boston at the gatealso SK 3585, AF 3726
22:35CM 1472 to Seattle leaves the gatealso UA 5579, NZ 9401
22 h 37 apart on the timetable, overnight
CM 1472 leaves 22 h 37 after DL 2919 arrives on the timetable: more than half a day, so not a connection we count.