A3 123 then W4 6724 at Athens
Thessaloniki → Athens → Venezia
Timetable, Athens time
20:40A3 123 from Thessaloniki at the gate
16:40W4 6724 to Venezia leaves the gate
20 h apart on the timetable, overnight
W4 6724 leaves 20 h after A3 123 arrives on the timetable: more than half a day, so not a connection we count.