FR 157 then EI 137 at Dublin
Leeds → Dublin → Boston
Timetable, Dublin time
21:55FR 157 from Leeds at the gate
16:45EI 137 to Boston leaves the gate
18 h 50 apart on the timetable, overnight
EI 137 leaves 18 h 50 after FR 157 arrives on the timetable: more than half a day, so not a connection we count.