UA 1141 then VS 20 at San Francisco
Miami → San Francisco → London
Timetable, San Francisco time
20:10UA 1141 from Miami at the gatealso CM 2873, NZ 2924, AZ 4454, EK 6316, VA 8394
16:40VS 20 to London leaves the gatealso NZ 4162, KL 4813, SV 4830, DL 5964, AF 9650
20 h 30 apart on the timetable, overnight
VS 20 leaves 20 h 30 after UA 1141 arrives on the timetable: more than half a day, so not a connection we count.