HV 6004 then KL 1017 at Schiphol
Porto → Amsterdam → London Heathrow
Timetable, Amsterdam time
21:40HV 6004 from Porto at the gate
20:40KL 1017 to London Heathrow leaves the gate
23 h apart on the timetable, overnight
KL 1017 leaves 23 h after HV 6004 arrives on the timetable: more than half a day, so not a connection we count.