A3 621 then A3 868 at Athens
Brussels → Athens → Krakow
Timetable, Athens time
15:25A3 621 from Brussels at the gate
11:00A3 868 to Krakow leaves the gate
19 h 35 apart on the timetable, overnight
A3 868 leaves 19 h 35 after A3 621 arrives on the timetable: more than half a day, so not a connection we count.