QR 3721 then EC 7155 at Barcelona
Granada → Barcelona → Milan
Timetable, Barcelona time
22:50QR 3721 from Granada at the gate
18:40EC 7155 to Milan leaves the gate
19 h 50 apart on the timetable, overnight
EC 7155 leaves 19 h 50 after QR 3721 arrives on the timetable: more than half a day, so not a connection we count.