Spanish low-cost airline Vueling is having a special 2×1 offer through December 19: Fly with a friend and your friend flies free. Of course, since you still have to pay the taxes, you might end up saving only a few euros from the actual flight fees, but it’s still worth checking out.
When flying out of Brussels, destinations include Barcelona, Madrid, Malaga, Valencia and Sevilla. Travel can be completed through March 31, 2008…. not a bad idea for a sunny weekend to escape from the cold Brussels winter!