Currently, the cheapest month to rent a car at Parma Airport is January. The most expensive time to rent a car is April. The cheapest prices for each month are shown above, but prices will vary based on availability, how far out you book your rental car, and of course, car type.
Typically, how long you can hire a car for depends on the inventory of the supplier. For Parma Airport however, it is certainly possible to rent a car for an entire month.