How to get from BCN to Budapest using Low Cost Carriers

[wrafter]

Hi,

Here's a test - how do I get from BCN to Budapest and back in January making only one stop each way and only using low cost carriers.

I don't want to have to do an overnighter, so that rules out German Wings in Stuttgart and Cologne-Bonn.

Any suggestions?

(Or can anyone say who might be the cheapest if it's not the low cost carriers - KLM.com is offering me EUR300 total, tax included.)