KL 618 then U2 7849 at Schiphol
Boston → Amsterdam → Birmingham (UK)
Timetable, Amsterdam time
09:45KL 618 from Boston at the gate
07:30U2 7849 to Birmingham (UK) leaves the gate
21 h 45 apart on the timetable, overnight
U2 7849 leaves 21 h 45 after KL 618 arrives on the timetable: more than half a day, so not a connection we count.