QR 3715 then FR 6300 at Barcelona
Rome → Barcelona → Sofia
Timetable, Barcelona time
13:35QR 3715 from Rome at the gatealso IB 5333, LL 5333, LA 5813, VY 6003
05:55FR 6300 to Sofia leaves the gate
16 h 20 apart on the timetable, overnight
FR 6300 leaves 16 h 20 after QR 3715 arrives on the timetable: more than half a day, so not a connection we count.