KL 749 then HV 6337 at Schiphol
Cartagena → Amsterdam → Valencia
Timetable, Amsterdam time
10:45KL 749 from Cartagena at the gate
07:25HV 6337 to Valencia leaves the gate
20 h 40 apart on the timetable, overnight
HV 6337 leaves 20 h 40 after KL 749 arrives on the timetable: more than half a day, so not a connection we count.