FR 11 then DL 155 at Dublin
Madrid → Dublin → Boston
Timetable, Dublin time
20:45FR 11 from Madrid at the gate
11:55DL 155 to Boston leaves the gate
15 h 10 apart on the timetable, overnight
DL 155 leaves 15 h 10 after FR 11 arrives on the timetable: more than half a day, so not a connection we count.