Should I fly or take the train from antwerp to barcelona?

Question

cheapest way

Answer 1

This all depends on how much time you have to work with. If you have a lot of time and are flexible, the train may be a great way to see Europe at leisure. It is on the long end and may be a tad on the expensive side.  However, if you have less time to work with and don't really care for what's in between Antwerp and Barcelona, the plane is the best.  Also, I think there are a lot of discount carriers in Europe that serve the intercontinental routes from secondary airports.

Answer 2

My preference would be to fly between the two cities.

Unless you plan on stopping in some towns, there really isn't much to see once you cross the border into Spain, especially between Madrid and Barcelona.