UA 2328 then B6 1034 at San Francisco
Vancouver → San Francisco → Boston
Timetable, San Francisco time
09:29UA 2328 from Vancouver at the gatealso AC 5110, NH 7395, NZ 9876
06:00B6 1034 to Boston leaves the gatealso EY 8006, EY 8261
20 h 31 apart on the timetable, overnight
B6 1034 leaves 20 h 31 after UA 2328 arrives on the timetable: more than half a day, so not a connection we count.