BA 285 then UA 785 at San Francisco
London → San Francisco → Washington
Timetable, San Francisco time
14:55BA 285 from London at the gatealso IB 3626, AS 5279, AY 5525, AA 6996, EI 8985
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
15 h 20 apart on the timetable, overnight
UA 785 leaves 15 h 20 after BA 285 arrives on the timetable: more than half a day, so not a connection we count.