A3 303 then A3 780 at Athens
Heraklion → Athens → Zagreb
Timetable, Athens time
09:00A3 303 from Heraklion at the gate
07:35A3 780 to Zagreb leaves the gate
22 h 35 apart on the timetable, overnight
A3 780 leaves 22 h 35 after A3 303 arrives on the timetable: more than half a day, so not a connection we count.