GQ 681 then FR 44 at Athens
Sofia → Athens → Vienna
Timetable, Athens time
11:40GQ 681 from Sofia at the gate
06:00FR 44 to Vienna leaves the gate
18 h 20 apart on the timetable, overnight
FR 44 leaves 18 h 20 after GQ 681 arrives on the timetable: more than half a day, so not a connection we count.