A3 877 then A3 868 at Athens
Budapest → Athens → Krakow
Timetable, Athens time
15:50A3 877 from Budapest at the gate
11:00A3 868 to Krakow leaves the gate
19 h 10 apart on the timetable, overnight
A3 868 leaves 19 h 10 after A3 877 arrives on the timetable: more than half a day, so not a connection we count.