GQ 461 then A3 712 at Athens
Karpathos → Athens → Barcelona
Timetable, Athens time
21:15GQ 461 from Karpathos at the gate
16:40A3 712 to Barcelona leaves the gate
19 h 25 apart on the timetable, overnight
A3 712 leaves 19 h 25 after GQ 461 arrives on the timetable: more than half a day, so not a connection we count.