Car rental at the airport... Good idea ?
Contrary to what one might think, the rental car at the airport is not always the best solution, because the prices are more expensive than elsewhere. Indeed, the agencies are taking advantage of their situation on site to offer prices up to 20% more expensive than the rest of the agencies.
Do not hesitate to expand your field of research and also direct you to the agencies located on your holiday to try to get the best price. They often offer very competitive rates compared to those offered to the Athens airport.