A3 971 then GQ 420 at Athens
Tirana → Athens → Zakynthos
Timetable, Athens time
12:20A3 971 from Tirana at the gate
09:30GQ 420 to Zakynthos leaves the gate
21 h 10 apart on the timetable, overnight
GQ 420 leaves 21 h 10 after A3 971 arrives on the timetable: more than half a day, so not a connection we count.