Out of all the popular cities in Portugal, Faro is the cheapest city to rent a car in at just C$ 13/day. Renting a car in Faro is 83% cheaper than renting one in Vila do Porto where the per day rate is around C$ 68. Other fairly inexpensive cities in Portugal to get a rental car in are: Porto (C$ 15/day), Lisbon (C$ 17/day), and Ponta Delgada (Açores) (C$ 18/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$ 17/day on their transportation. The most popular city to rent a car in Portugal is Lisbon.