AS 634 then VS 20 at San Francisco
Las Vegas → San Francisco → London
Timetable, San Francisco time
17:41AS 634 from Las Vegas at the gatealso QF 3697, FJ 5841, AA 7412, CX 7935, QR 8861
16:40VS 20 to London leaves the gatealso NZ 4162, KL 4813, SV 4830, DL 5964, AF 9650
22 h 59 apart on the timetable, overnight
VS 20 leaves 22 h 59 after AS 634 arrives on the timetable: more than half a day, so not a connection we count.