BA 4200 then FR 7157 at Madrid
Boston → Madrid → Dublin
Timetable, Madrid time
08:30BA 4200 from Boston at the gatealso AY 5370, EI 5852, AA 8849
07:00FR 7157 to Dublin leaves the gate
22 h 30 apart on the timetable, overnight
FR 7157 leaves 22 h 30 after BA 4200 arrives on the timetable: more than half a day, so not a connection we count.