GQ 421 then A3 318 at Athens
Zakynthos → Athens → Heraklion
Timetable, Athens time
19:15GQ 421 from Zakynthos at the gate
16:50A3 318 to Heraklion leaves the gate
21 h 35 apart on the timetable, overnight
A3 318 leaves 21 h 35 after GQ 421 arrives on the timetable: more than half a day, so not a connection we count.