NP 6531 then FR 4585 at Barcelona
Cairo → Barcelona → Porto
Timetable, Barcelona time
12:30NP 6531 from Cairo at the gate
09:35FR 4585 to Porto leaves the gate
21 h 05 apart on the timetable, overnight
FR 4585 leaves 21 h 05 after NP 6531 arrives on the timetable: more than half a day, so not a connection we count.