Can an Icelandic tourist visa be transferred to Spain?

Iceland tourist visa can be transferred to Spain, Iceland is a Schengen country, and Spain is also a Schengen country, so if you have a visa from either of these two countries, you can go to another country.

You can go to any Schengen country with a Schengen visa.

Schengen countries include Austria, Belgium, Denmark, Finland, France, Germany, Iceland, Italy, Greece, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Hungary, Czech Republic, Slovakia, Slovenia, Poland, Estonia, Latvia, Lithuania, Malta, Switzerland and Liechtenstein.