keddy by Europcar
Generally, for a better deal at Roma Airport it’s recommended to book in a timely manner (to save up to 91%). Cheapflights recommends you book around 6 days prior to your pickup date. Booking as early as you can also increases the likelihood that you’ll get the ideal car.
The length of time you can book a rental for is subject to the inventory of the supplier. When renting a vehicle from Roma Airport it should be possible to rent a car for a whole month if needed.