KL 668 then U2 7899 at Schiphol
Austin → Amsterdam → Valencia
Timetable, Amsterdam time
10:25KL 668 from Austin at the gate
07:00U2 7899 to Valencia leaves the gate
20 h 35 apart on the timetable, overnight
U2 7899 leaves 20 h 35 after KL 668 arrives on the timetable: more than half a day, so not a connection we count.