UA 2328 then TP 4392 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
22:10TP 4392 to Boston leaves the gate
12 h 41 apart on the timetable
TP 4392 leaves 12 h 41 after UA 2328 arrives on the timetable: more than half a day, so not a connection we count.