FR 10 then IB 719 at Madrid
Dublin → Madrid → London Heathrow
Timetable, Madrid time
21:15FR 10 from Dublin at the gate
14:55IB 719 to London Heathrow leaves the gatealso VY 5226, QR 5346, LA 5409, DT 6162, BA 7054, AA 8653
17 h 40 apart on the timetable, overnight
IB 719 leaves 17 h 40 after FR 10 arrives on the timetable: more than half a day, so not a connection we count.