EC 3749 then FR 8615 at Barcelona
Milan → Barcelona → Seville
Timetable, Barcelona time
21:30EC 3749 from Milan at the gate
10:45FR 8615 to Seville leaves the gate
13 h 15 apart on the timetable, overnight
FR 8615 leaves 13 h 15 after EC 3749 arrives on the timetable: more than half a day, so not a connection we count.