UA 649 then CM 1472 at San Francisco
Chicago O'Hare → San Francisco → Seattle
Timetable, San Francisco time
21:22UA 649 from Chicago O'Hare at the gatealso AC 4115
21:05CM 1472 to Seattle leaves the gatealso UA 5579
23 h 43 apart on the timetable, overnight
CM 1472 leaves 23 h 43 after UA 649 arrives on the timetable: more than half a day, so not a connection we count.