It is important to check all the requirements you need to meet when travelling with children and babies, depending on their age and your destination. Everyone aged 14 and over must carry an ID card or passport. This is not required for children under 14 on domestic flights, but it is advisable because it makes it easier to identify them. Children travelling with their parents Domestic flights. Parents of children under age 14 without an ID card or passport must bring their Family Book. International flights (European and third countries). All children must have their own ID card or passport and must also meet the requirements of the destination country. Children travelling alone or whose companion is not one of their parents: Domestic flights. For children under 14 without an ID card or passport, the authorities may require one or more of the following documents: Notarial attestation with the personal details and a photograph of the child. Authorisation formalised at any police/civil guard station, town hall or notary's office (in person by the father, mother or guardian) on behalf of the person who will be in charge of the child during the trip, which will be checked against the person's ID card or passport. International flights (European and third countries). All children must have their own ID card or passport and must also meet the requirements of the destination country. If they are travelling alone, the passport or the ID card must be accompanied by a travel consent form signed by the parent or guardian, formalised at a police station. In the case of foreign children living in Spain, their legal representatives must go to the consulate to fill in the necessary documentation according to their national legislation. If you want to book our unaccompanied minors service, you can check the costs, recommendations and all the necessary information under Children travelling alone.