Out of all the popular cities in Portugal, Faro is the cheapest city to rent a car in at just C$ 14/day. Renting a car in Faro is 83% cheaper than renting one in Vila do Porto where the per day rate is around C$ 74. Other fairly inexpensive cities in Portugal to get a rental car in are: Porto (C$ 16/day), Lisbon (C$ 18/day), and Ponta Delgada (Açores) (C$ 19/day). While these cities typically have cheaper prices than the rest of the country, travelers looking to rent a car in Lisbon should expect to spend around C$ 18/day on their transportation. The most popular city to rent a car in Portugal is Lisbon.