FR 752 then FR 182 at Vienna
Porto → Vienna → Sofia
Timetable, Vienna time
14:45FR 752 from Porto at the gate
11:40FR 182 to Sofia leaves the gate
20 h 55 apart on the timetable, overnight
FR 182 leaves 20 h 55 after FR 752 arrives on the timetable: more than half a day, so not a connection we count.