Athens Airport car rental options include Avis, Budget, Europcar, Hertz, Sixt, and Alamo through their Greek car hire partners National Car Rental.
All these companies currently have offices at the airport itself, although other companies will deliver cars to the airport to greet you on arrival so you should still shop around for the best deals. To check current details of car rental companies at Athens Airport visit the Athens International Airport website.
It's almost always better to book your Athens car rental in advance, both to save time on arrival and to be sure a car is available. In busy periods not all companies may have hire cars there. In any case, renting on the spur of the moment will be more expensive than booking your rental car online or over the phone in advance.
Something else to watch for is that not all the companies with airport offices are there 24 hours, and there may be extra charges to pick up a rental car or drop it off outside of normal office hours. Check before booking any rental car.
Athens Airport Car Rentals is a car rental company based close to the airport in Ano Glyfada and which will arrange to collect and return cars at the airport for you.
Aegina in the Saronic Gulf Islands is an easy day trip from Athens. This page from Greece Travel Secrets also gives details of ferries and what to do..
Matala Beach on Crete is a guest blog for Greece Travel Secrets from the We Love Crete website, inviting you to Awaken Your Inner Hippy in Matala, Crete.
Greece Book Reviews on the Greece Travel Secrets website with reviews of the best guidebooks to Greece, the Greek Islands, Athens, Crete and elsewhere.