GQ 273 then A3 712 at Athens
Corfu → Athens → Barcelona
Timetable, Athens time
17:00GQ 273 from Corfu at the gate
16:40A3 712 to Barcelona leaves the gate
23 h 40 apart on the timetable, overnight
A3 712 leaves 23 h 40 after GQ 273 arrives on the timetable: more than half a day, so not a connection we count.