Interesting suggestion there Boss Raptor - hadn't thought of it - however the Air Europa site's coming in with a EUR590 offer BCN-MAD-BUDAPEST. (EUR377 without BCN-MAD connection, which with a EUR66 Iberia flight would still push it into the 400s.)
The internet age offers a myriad of options - dizzying in fact - London, Amsterdam, many airports in Germany, Paris, Madrid - are all options - it's modern day investigation, which is what gives me the buzz... trying to find that elusive great deal.
Thanks for aiding in the investigation, nonetheless!! :-)