SQ 1460 then VS 20 at San Francisco
New York JFK → San Francisco → London
Timetable, San Francisco time
22:42SQ 1460 from New York JFK at the gate
16:40VS 20 to London leaves the gatealso NZ 4162, KL 4813, SV 4830, DL 5964, AF 9650
17 h 58 apart on the timetable, overnight
VS 20 leaves 17 h 58 after SQ 1460 arrives on the timetable: more than half a day, so not a connection we count.