A3 253 then SN 3246 at Athens
Mytilene → Athens → Brussels
Timetable, Athens time
14:00A3 253 from Mytilene at the gate
12:05SN 3246 to Brussels leaves the gate
22 h 05 apart on the timetable, overnight
SN 3246 leaves 22 h 05 after A3 253 arrives on the timetable: more than half a day, so not a connection we count.