FR 574 then BT 878 at Barcelona
Bologna → Barcelona → Tallinn
Timetable, Barcelona time
20:15FR 574 from Bologna at the gate
11:25BT 878 to Tallinn leaves the gate
15 h 10 apart on the timetable, overnight
BT 878 leaves 15 h 10 after FR 574 arrives on the timetable: more than half a day, so not a connection we count.