Out of all the popular cities in Denmark, Copenhagen is the cheapest city to rent a car in at just C$ 37/day. Renting a car in Copenhagen is 44% cheaper than renting one in Aalborg where the per day rate is around C$ 65. Other fairly inexpensive cities in Denmark to get a rental car in are: Aarhus (C$ 41/day), Billund (C$ 41/day), and Aalborg (C$ 65/day). While these cities typically have cheaper prices than the rest of the country, travelers looking to rent a car in Copenhagen should expect to spend around C$ 37/day on their transportation. The most popular city to rent a car in Denmark is Copenhagen.