A3 355 then A3 868 at Athens
Santorini → Athens → Krakow
Timetable, Athens time
12:40A3 355 from Santorini at the gate
11:00A3 868 to Krakow leaves the gate
22 h 20 apart on the timetable, overnight
A3 868 leaves 22 h 20 after A3 355 arrives on the timetable: more than half a day, so not a connection we count.