JU 8510 then CM 1472 at San Francisco
New York JFK → San Francisco → Seattle
Timetable, San Francisco time
23:54JU 8510 from New York JFK at the gate
21:05CM 1472 to Seattle leaves the gatealso UA 5579
21 h 11 apart on the timetable, overnight
CM 1472 leaves 21 h 11 after JU 8510 arrives on the timetable: more than half a day, so not a connection we count.