Out of all the popular cities in Spain, Madrid is the cheapest city to rent a car in at just C$ 4/day. Renting a car in Madrid is 77% cheaper than renting one in Granadilla where the per day rate is around C$ 18. Other fairly inexpensive cities in Spain to get a rental car in are: Barcelona (C$ 4/day), Palma de Mallorca (C$ 5/day), and Sevilla (C$ 5/day). While these cities typically have cheaper prices than the rest of the country, travelers looking to rent a car in Barcelona should expect to spend around C$ 4/day on their transportation. The most popular city to rent a car in Spain is Barcelona.