AZ 4417 then CM 1472 at San Francisco
Washington → San Francisco → Seattle
Timetable, San Francisco time
21:29AZ 4417 from Washington at the gate
21:05CM 1472 to Seattle leaves the gatealso UA 5579
23 h 36 apart on the timetable, overnight
CM 1472 leaves 23 h 36 after AZ 4417 arrives on the timetable: more than half a day, so not a connection we count.