IB 5371 then IB 5944 at Barcelona
Firenze → Barcelona → Strasbourg
Timetable, Barcelona time
11:35IB 5371 from Firenze at the gate
05:50IB 5944 to Strasbourg leaves the gatealso LL 5944, VY 8144
18 h 15 apart on the timetable, overnight
IB 5944 leaves 18 h 15 after IB 5371 arrives on the timetable: more than half a day, so not a connection we count.