QR 3722 then OS 404 at Barcelona
Firenze → Barcelona → Vienna
Timetable, Barcelona time
23:50QR 3722 from Firenze at the gate
18:10OS 404 to Vienna leaves the gate
18 h 20 apart on the timetable, overnight
OS 404 leaves 18 h 20 after QR 3722 arrives on the timetable: more than half a day, so not a connection we count.