CM 2329 then UA 1531 at San Francisco
Seattle → San Francisco → Washington
Timetable, San Francisco time
21:50CM 2329 from Seattle at the gate
21:28UA 1531 to Washington leaves the gatealso CA 7312
23 h 38 apart on the timetable, overnight
UA 1531 leaves 23 h 38 after CM 2329 arrives on the timetable: more than half a day, so not a connection we count.