A3 722 then VY 6503 at Lisbon
Athens → Lisbon → Bilbao
Timetable, Lisbon time
16:15A3 722 from Athens at the gate
13:50VY 6503 to Bilbao leaves the gate
21 h 35 apart on the timetable, overnight
VY 6503 leaves 21 h 35 after A3 722 arrives on the timetable: more than half a day, so not a connection we count.