A3 991 then A3 670 at Athens
Istanbul → Athens → Venezia
Timetable, Athens time
12:00A3 991 from Istanbul at the gate
10:30A3 670 to Venezia leaves the gate
22 h 30 apart on the timetable, overnight
A3 670 leaves 22 h 30 after A3 991 arrives on the timetable: more than half a day, so not a connection we count.