A3 851 then GQ 840 at Athens
Zurich → Athens → Vienna
Timetable, Athens time
14:50A3 851 from Zurich at the gate
11:40GQ 840 to Vienna leaves the gate
20 h 50 apart on the timetable, overnight
GQ 840 leaves 20 h 50 after A3 851 arrives on the timetable: more than half a day, so not a connection we count.