A3 877 then A3 256 at Athens
Budapest → Athens → Mytilene
Timetable, Athens time
19:20A3 877 from Budapest at the gate
17:30A3 256 to Mytilene leaves the gate
22 h 10 apart on the timetable, overnight
A3 256 leaves 22 h 10 after A3 877 arrives on the timetable: more than half a day, so not a connection we count.