Google Flights has launched for Spain, showing a comprehensive network of flights into and out of Spain, and a price comparision tool.
However, rather annoyingly, none of the major “low costs” such as Ryanair, Easyjet, LAN or Binter Canarias (who?!) allow their flights to appear on it.
You can also see a map showing stop overs, etc. Quite fun for about 45 seconds.
For some reason – prices are quoted in US$.
So, actually, it’s pretty useless. Probably good for the long distance flights tho’.