QR 3617 then QR 3566 at Barcelona
Nantes → Barcelona → Rome
Timetable, Barcelona time
13:55QR 3617 from Nantes at the gatealso IB 5481, LL 5481, VY 8141
10:05QR 3566 to Rome leaves the gate
20 h 10 apart on the timetable, overnight
QR 3566 leaves 20 h 10 after QR 3617 arrives on the timetable: more than half a day, so not a connection we count.