A3 791 then GQ 344 at Athens
Ljubljana → Athens → Santorini
Timetable, Athens time
21:00A3 791 from Ljubljana at the gate
17:15GQ 344 to Santorini leaves the gate
20 h 15 apart on the timetable, overnight
GQ 344 leaves 20 h 15 after A3 791 arrives on the timetable: more than half a day, so not a connection we count.