W6 2339 then W6 4316 at Fiumicino
Budapest → Rome → Sofia
Timetable, Rome time
07:55W6 2339 from Budapest at the gate
20:15W6 4316 to Sofia leaves the gate
12 h 20 apart on the timetable
W6 4316 leaves 12 h 20 after W6 2339 arrives on the timetable: more than half a day, so not a connection we count.