U2 2921 then KL 605 at Schiphol
Bristol → Amsterdam → San Francisco
Timetable, Amsterdam time
15:50U2 2921 from Bristol at the gate
09:50KL 605 to San Francisco leaves the gate
18 h apart on the timetable, overnight
KL 605 leaves 18 h after U2 2921 arrives on the timetable: more than half a day, so not a connection we count.