KL 423 then HV 5951 at Schiphol
Ad Dammam → Amsterdam → Lisbon
Timetable, Amsterdam time
07:40KL 423 from Ad Dammam at the gate
06:50HV 5951 to Lisbon leaves the gate
23 h 10 apart on the timetable, overnight
HV 5951 leaves 23 h 10 after KL 423 arrives on the timetable: more than half a day, so not a connection we count.