FR 657 then SN 3703 at Brussels
Dublin → Brussels → Barcelona
Timetable, Brussels time
17:05FR 657 from Dublin at the gate
14:50SN 3703 to Barcelona leaves the gate
21 h 45 apart on the timetable, overnight
SN 3703 leaves 21 h 45 after FR 657 arrives on the timetable: more than half a day, so not a connection we count.