U.S. citizens traveling to Spain are not subject to any COVID-19 entry restrictions.
Spain is a party to the Schengen Agreement. This means that U.S. citizens may enter Spain for up to 90 days for tourism or business without a visa. Your passport should be valid for at least three months beyond the period of stay. You must have sufficient funds and a return airline ticket. Visit the Embassy of Spain website for the most current visa information.
Traveling Through Europe: If you are planning to visit, transit and/or travel through European countries, you should be familiar with the requirements of the Schengen Agreement.