IB 306 then FR 494 at Madrid
Monterrey → Madrid → Dublin
Timetable, Madrid time
13:50IB 306 from Monterrey at the gatealso BA 7180
10:10FR 494 to Dublin leaves the gate
20 h 20 apart on the timetable, overnight
FR 494 leaves 20 h 20 after IB 306 arrives on the timetable: more than half a day, so not a connection we count.