CM 2327 then B6 1534 at San Francisco
Seattle → San Francisco → Boston
Timetable, San Francisco time
23:00CM 2327 from Seattle at the gatealso UA 5402, VA 8296
22:10B6 1534 to Boston leaves the gatealso EY 8032
23 h 10 apart on the timetable, overnight
B6 1534 leaves 23 h 10 after CM 2327 arrives on the timetable: more than half a day, so not a connection we count.