CZ 759 then EC 3750 at Barcelona
Doha → Barcelona → Milan
Timetable, Barcelona time
07:05CZ 759 from Doha at the gatealso IB 6201, LA 7405
22:05EC 3750 to Milan leaves the gate
15 h apart on the timetable
EC 3750 leaves 15 h after CZ 759 arrives on the timetable: more than half a day, so not a connection we count.