Yes they have dirt cheap fares between DUB and Spain, but these are only valid using when using the direct DUB-MAD service (rather than via LON on BD).

Try to book from their site though. At least, they have finally added DUB to departure points (before it was just in the arrivals list). Every time I try to book anything, it comes back with an error message. The only thing you seem to be able to book are domestic flights, using the green days link.

Also, no usable timetable which makes it difficult to actually identify the days on which the service operates.

I poked around on travelocity (expedia for some reason cannot issue JK tickets). Could find flights out of DUB on JK al the low price, but none on the return in a period of over 4 weeks this summer.

Don't know why they don't list LHR as a possible point or origin, since they codeshare with BD on LHR-MAD. Just can't see any technical reason, other than they don't want to sell direct in the UK. Wonder whether they consider that marketing for UK departures is for BD. But then, the BD site does not allow you to book through tickets to Spanish destinations other than the direct services to MAD and PMI.

At least, they now include DUB, which is better than nothing. Next thing for them will be to get the booking engine to actually work.