LA 6139 then CX 873 at San Francisco
Boston → San Francisco → Hong Kong
Timetable, San Francisco time
23:58LA 6139 from Boston at the gate
22:55CX 873 to Hong Kong leaves the gatealso OM 5873, AS 7290, AA 8931, MH 9183
22 h 57 apart on the timetable, overnight
CX 873 leaves 22 h 57 after LA 6139 arrives on the timetable: more than half a day, so not a connection we count.