OS 403 then QR 3678 at Barcelona
Vienna → Barcelona → Palermo
Timetable, Barcelona time
17:20OS 403 from Vienna at the gate
15:40QR 3678 to Palermo leaves the gate
22 h 20 apart on the timetable, overnight
QR 3678 leaves 22 h 20 after OS 403 arrives on the timetable: more than half a day, so not a connection we count.