A3 855 then SN 3246 at Athens
Geneva → Athens → Brussels
Timetable, Athens time
14:50A3 855 from Geneva at the gate
12:05SN 3246 to Brussels leaves the gate
21 h 15 apart on the timetable, overnight
SN 3246 leaves 21 h 15 after A3 855 arrives on the timetable: more than half a day, so not a connection we count.