LL 5107 then QR 3545 at Barcelona
Prague → Barcelona → Santiago de Compostela
Timetable, Barcelona time
13:15LL 5107 from Prague at the gate
10:00QR 3545 to Santiago de Compostela leaves the gate
20 h 45 apart on the timetable, overnight
QR 3545 leaves 20 h 45 after LL 5107 arrives on the timetable: more than half a day, so not a connection we count.