BA 632 then SN 3246 at Athens
London Heathrow → Athens → Brussels
Timetable, Athens time
15:20BA 632 from London Heathrow at the gate
12:05SN 3246 to Brussels leaves the gate
20 h 45 apart on the timetable, overnight
SN 3246 leaves 20 h 45 after BA 632 arrives on the timetable: more than half a day, so not a connection we count.