A3 121 then W4 6724 at Athens
Thessaloniki → Athens → Venezia
Timetable, Athens time
19:10A3 121 from Thessaloniki at the gate
16:40W4 6724 to Venezia leaves the gate
21 h 30 apart on the timetable, overnight
W4 6724 leaves 21 h 30 after A3 121 arrives on the timetable: more than half a day, so not a connection we count.