GQ 383 then A3 780 at Athens
Thessaloniki → Athens → Zagreb
Timetable, Athens time
13:10GQ 383 from Thessaloniki at the gate
07:35A3 780 to Zagreb leaves the gate
18 h 25 apart on the timetable, overnight
A3 780 leaves 18 h 25 after GQ 383 arrives on the timetable: more than half a day, so not a connection we count.