Spain has lifted all COVID-19 restrictions for travelers arriving from countries of the European Union or the Schengen zone. However, controls will be carried out and a certificate of vaccination, recovery or negative test for the coronavirus will be required for those entering the country by plane or ship, from non-EU countries (including the United Kingdom). These restrictions have been extended until at least November 15, which means that there are still several documents that every traveler, including eu residents, must show before they can enter Spain:

• Full vaccination for the certificate involves only the first two doses if less than nine months have passed since the second jab. If more time has passed, those over 18 years of age will need to have received a third booster dose. For minors, the first two doses are always sufficient.
• If you have not been vaccinated, you can provide an official document certifying that you have passed the COVID-19 in the last six months or that you have tested negative in a test carried out just before the trip. Both antigen tests (performed 24 hours before travel) and PCR tests (72 hours) are valid.