A3 359 then GQ 388 at Athens
Santorini → Athens → Thessaloniki
Timetable, Athens time
19:30A3 359 from Santorini at the gate
19:00GQ 388 to Thessaloniki leaves the gate
23 h 30 apart on the timetable, overnight
GQ 388 leaves 23 h 30 after A3 359 arrives on the timetable: more than half a day, so not a connection we count.