FR 4584 then A3 711 at Barcelona
Porto → Barcelona → Athens
Timetable, Barcelona time
18:55FR 4584 from Porto at the gate
11:20A3 711 to Athens leaves the gate
16 h 25 apart on the timetable, overnight
A3 711 leaves 16 h 25 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.