FR 1243 then EC 3656 at Athens
Budapest → Athens → Milan
Timetable, Athens time
18:30FR 1243 from Budapest at the gate
10:50EC 3656 to Milan leaves the gate
16 h 20 apart on the timetable, overnight
EC 3656 leaves 16 h 20 after FR 1243 arrives on the timetable: more than half a day, so not a connection we count.