Overview
Let us be direct: you do not want to drive in central Athens. The traffic is adversarial, the streets are confusing, parking is a blood sport, and the public transport works just fine for the Acropolis, Plaka, and the museum district. Where a rental car in Athens makes perfect sense is for everything around the city — and there is a lot around the city.
Athens Airport (ATH) is one of the biggest rental hubs in southeastern Europe. The car rental center sits across from the arrivals terminal with covered walkway access, and the selection ranges from Hertz and Europcar down to local Greek operators like Autocandia, Avance, and Drive SA. Prices start around 18 EUR/day in shoulder season for a basic Fiat Panda or Toyota Aygo, climbing to 35-55 EUR in the July-August peak. Online pre-booking is essential in summer — walk-in rates are significantly higher, and automatic transmission cars sell out weeks in advance.
The smart move is to pick up the car on the day you leave Athens, not the day you arrive. Spend your first days in the city without a car, then grab one at the airport (or from a Syngrou Avenue agency) when you are ready to head out. Delphi is 2.5 hours northwest. The Peloponnese — Nafplio, Epidaurus, Mycenae, Monemvasia — starts about 90 minutes south once you cross the Corinth Canal. Cape Sounion and the Temple of Poseidon is a 70 km coastal drive. Any of these can be multi-day loops that start and end in Athens, and having your own car is the difference between a tour bus schedule and actual freedom.

Driving tips
Athens traffic deserves its reputation. The Attiki Odos ring road and the main motorways out of the city are fine — modern, tolled, well-signposted. The problem is the urban streets. Lane markings are decorative, double parking is a way of life, motorcycles appear from every direction, and the one-way street system in the center seems designed by someone with a grudge. If you must drive through the center, use Google Maps or Waze in real time and prepare for creative routing.
Once you clear the metropolitan area, driving in mainland Greece improves dramatically. The motorway network (A1 to Thessaloniki, A8 to Patras, A7 to Kalamata) is modern and well-maintained, though the tolls accumulate — Athens to Thessaloniki costs about 30 EUR one way. National roads between the motorways are two-lane affairs with a Greek flavor: overtaking on blind curves is considered normal by locals, and you will regularly encounter trucks, tractors, and the occasional herd of goats.
Speed cameras exist on the motorways but enforcement is inconsistent. The bigger risk is the police radar traps on national roads, which can appear anywhere. The limit is 130 km/h on motorways, 90 km/h on open roads, and 50 km/h in towns. Fines range from 40 EUR for minor speeding to 350 EUR for serious violations.
One thing that catches visitors off guard: Greek petrol stations often close by 8-9 PM, especially on national roads and in rural areas. Fill up during the day if you are doing a long drive.
Parking
We will say it one more time: do not try to park in central Athens unless you enjoy stress. The streets around Plaka, Monastiraki, and Syntagma have almost zero legal parking, and the garages that exist charge 8-15 EUR/day for cramped underground spaces. If you are seeing the city sights, take the metro.
If you must have a car in Athens, the neighborhoods of Koukaki and Makrigianni (south of the Acropolis) are slightly more manageable for street parking, especially in the evening. Hotels with private parking exist but tend to be on the outskirts.
For day trips, the logistics work best when you pick up and drop off at the same point — the airport for fly-in visitors, or a Syngrou Avenue agency for city-based ones. The airport itself has long-term parking from 12 EUR/day in the official lot, or cheaper at the private lots along the access road.
Piraeus port has several open lots near the ferry terminals charging 10-15 EUR/day. This is useful if you want to park a rental car, take a ferry to an island, and pick it up again when you return. Just make sure your rental period covers the days the car sits parked.
Border crossing
Athens is not a typical starting point for cross-border trips by car — the distances to the nearest borders are substantial. Thessaloniki, the gateway to Bulgaria and North Macedonia, is 500 km north (5 hours of motorway driving, 30 EUR in tolls). From Thessaloniki, Sofia is another 3 hours and Skopje is 4 hours.
The more practical cross-border route is northwest to Albania via Ioannina and the Kakavia border crossing — about 550 km, 6 hours. This is a long drive for a day trip but works as part of a multi-day loop.
In general, cross-border travel from Greece is possible but agencies have varied policies. Greek rental companies are more likely to allow crossings to Bulgaria and North Macedonia than to Turkey or Albania. Always declare your plans at booking time, and expect cross-border fees of 40-80 EUR.