Out of all the popular cities in Spain, Málaga is the cheapest city to rent a car in at just C$ 5/day. Renting a car in Málaga is 60% cheaper than renting one in Barcelona where the per day rate is around C$ 15. Other fairly inexpensive cities in Spain to get a rental car in are: Arrecife (C$ 6/day), Alicante (C$ 6/day), and Bilbao (C$ 8/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$ 15/day on their transportation. The most popular city to rent a car in Spain is Barcelona.