Out of all the popular cities in Austria, Vienna is the cheapest city to rent a car in at just $23/day. Renting a car in Vienna is 40% cheaper than renting one in Linz where the per day rate is around $38. Other fairly inexpensive cities in Austria to get a rental car in are: Innsbruck ($26/day), Salzburg ($28/day), and Klagenfurt ($30/day). While these cities typically have cheaper prices than the rest of the country, travelers looking to rent a car in Vienna should expect to spend around $23/day on their transportation. The most popular city to rent a car in Austria is Vienna.