Just found this for a mate..
Friday 9th - Edin 14.20 - Dublin 15.15 Ryanair
Dublin 17.25 - Faro 20.20 Aer Lingus
Monday 12th - Faro 10am - Dublin 12.50 Aer Lingus
Dublin 19.35 - Edin 20.45 Ryanair
Ryanair flights are £52
Aer Lingus flight are £133
Decent enough not sure if can be found cheaper.
May be of some use to someone