Avis
keddy by Europcar
Budget
Firefly
Hertz
Sixt
Sunnycars
Thrifty
Generally, for a better deal at Roma Airport it’s recommended to book in a timely manner (to save up to 72%). Cheapflights recommends you book around 70 days prior to your pickup date. Booking as early as you can also increases the likelihood that you’ll get the ideal car.
Typically how long you can rent a car for depends on the inventory of the supplier. For Roma Airport however, it is certainly possible to rent a car for an entire month.