EC 7152 then TK 1854 at Barcelona
Milan → Barcelona → Istanbul
Timetable, Barcelona time
14:25EC 7152 from Milan at the gate
12:20TK 1854 to Istanbul leaves the gate
21 h 55 apart on the timetable, overnight
TK 1854 leaves 21 h 55 after EC 7152 arrives on the timetable: more than half a day, so not a connection we count.