OS 801 then SN 3246 at Athens
Vienna → Athens → Brussels
Timetable, Athens time
12:40OS 801 from Vienna at the gate
12:05SN 3246 to Brussels leaves the gate
23 h 25 apart on the timetable, overnight
SN 3246 leaves 23 h 25 after OS 801 arrives on the timetable: more than half a day, so not a connection we count.