F9 3581 then CM 1472 at San Francisco
Santa Ana → San Francisco → Seattle
Timetable, San Francisco time
21:38F9 3581 from Santa Ana at the gate
21:05CM 1472 to Seattle leaves the gatealso UA 5579
23 h 27 apart on the timetable, overnight
CM 1472 leaves 23 h 27 after F9 3581 arrives on the timetable: more than half a day, so not a connection we count.