EI 631 then FR 1986 at Dublin
Brussels → Dublin → Nantes
Timetable, Dublin time
11:05EI 631 from Brussels at the gate
05:45FR 1986 to Nantes leaves the gate
18 h 40 apart on the timetable, overnight
FR 1986 leaves 18 h 40 after EI 631 arrives on the timetable: more than half a day, so not a connection we count.