A3 307 then A3 780 at Athens
Heraklion → Athens → Zagreb
Timetable, Athens time
12:20A3 307 from Heraklion at the gate
07:35A3 780 to Zagreb leaves the gate
19 h 15 apart on the timetable, overnight
A3 780 leaves 19 h 15 after A3 307 arrives on the timetable: more than half a day, so not a connection we count.