VA 8297 then BA 284 at San Francisco
Seattle → San Francisco → London
Timetable, San Francisco time
21:50VA 8297 from Seattle at the gate
17:25BA 284 to London leaves the gatealso IB 3625, AS 5278, AY 5524, AA 6995, EI 8984
19 h 35 apart on the timetable, overnight
BA 284 leaves 19 h 35 after VA 8297 arrives on the timetable: more than half a day, so not a connection we count.