CZ 1646 then UA 930 at San Francisco
Charlotte → San Francisco → London
Timetable, San Francisco time
17:33CZ 1646 from Charlotte at the gate
16:40UA 930 to London leaves the gatealso LX 3049, AC 5376, OS 7858, SN 9100, LH 9379, NZ 9854
23 h 07 apart on the timetable, overnight
UA 930 leaves 23 h 07 after CZ 1646 arrives on the timetable: more than half a day, so not a connection we count.