FR 7595 then OS 802 at Athens
Budapest → Athens → Vienna
Timetable, Athens time
00:30FR 7595 from Budapest at the gate
13:25OS 802 to Vienna leaves the gate
12 h 55 apart on the timetable
OS 802 leaves 12 h 55 after FR 7595 arrives on the timetable: more than half a day, so not a connection we count.