BT 877 then IB 5146 at Barcelona
Tallinn → Barcelona → Seville
Timetable, Barcelona time
10:30BT 877 from Tallinn at the gate
09:10IB 5146 to Seville leaves the gate
22 h 40 apart on the timetable, overnight
IB 5146 leaves 22 h 40 after BT 877 arrives on the timetable: more than half a day, so not a connection we count.