Like when you're looking for cheaper price, it's possible to search directly from a car rental company or use pages that compare the prices of various companies and ultimately direct you to the company's page. If you have time and know all the companies, you can search one by one until you find the price best suited to what you're looking for. It's the best way to ensure the conditions offered by each price -type of insurance, second driver, mileage, etc. - but you can also make a first selection using a comparator and, from that sieve, see the conditions of each of the companies that fit your budget. Visit
www.drivy.co.uk/ and learn further more information about car rental.
You can use Rentalcars.com for example to make that first sieve and to discover new car rental companies. The operation is as simple as indicating the point and date of collection and point of return, if different, and the date. From there it is possible to see the rest of details in the file of each company.
Rent a car without a credit card
Since basic rentals are insured with excess, it is necessary to include a credit card so that the company can collect the money in the event of an accident. This may be a limitation if a credit card is not available. In the car rental comparator Rentalcars.com you can rent a car without a credit card: they accept debit card, prepaid cards, transfer, automatic debit, etc.
The international driver’s license
If you want to rent a car in your country of residence it is obvious that you will not need more than your own driving license. Many countries have agreements that allow their citizens to drive without needing more documents, but not all of them do. In the event that your driving licence is not valid in the country you are travelling to, you will need to obtain an international driving licence which you will be required to obtain when you hand over your car at the rental office.
For which countries an international driver’s license is required
As explained on the DGT website, the international driving licence, or international driving licence, is necessary for Spaniards who wish to drive temporarily in countries that are not members of the European Union and who "have not adopted the model licence provided for in the Geneva or Vienna Conventions". Which are the countries where an international driving licence is required? I haven't been able to find a list, but the quickest way to find out if the international driving licence is required in the country you are travelling to is to look at this link on the website of the Spanish Ministry of Foreign Affairs. You have to choose the country, click on "Travel Recommendations" and look at "Documentation and Visas" or "Others" - depending on the country it is in a different section -, where the driving licence is talked about.
Is it necessary to have an international driver’s license in the US?
Spain has no agreements on the validity of the Spanish driving license with any U.S. state in the country. So you need an international driving license to drive a vehicle in the US. In some states it is obligatory to carry also the driving license of the country of origin together with the international one.
How to get your international driver’s license?
All the information on how to obtain an international driving licence is available on the website of the Directorate General of Traffic and it is also possible to request an appointment for formalities via the Internet. If you are not Spanish, these details will be on the website of your country's traffic address, where they will also inform you if there is an agreement between your country and the country you are going to travel to, i.e. whether an international driving licence is necessary.