Which Greek island should you visit from Athens? A first-timer's guide

The question I get asked most often by people planning their first trip to Greece: “Should I go to one of the islands, and if so, which one?” The honest answer is: it depends almost entirely on what kind of experience you’re after. Here’s how to think through it.

The first decision: day trip or overnight?

From Athens, a subset of the Greek islands are reachable as day trips. The Saronic islands — Aegina, Poros, Hydra, Spetses — are the main candidates, with ferry times ranging from 35 minutes (Aegina by high-speed) to about 90 minutes (Hydra). The further Cycladic islands — Santorini, Mykonos, Paros — require either a full overnight stay or a flight, because the ferry journey is four to seven hours each way.

If your time in Greece is limited to Athens and a quick island fix, the Saronic islands are the sensible answer. Hydra in particular — car-free, beautiful, with clear water and good swimming — makes an excellent full-day excursion. The Hydra full-day swimming and exploration trip is a well-run option that handles the logistics, including ferry transfers from Piraeus.

For something broader, the Saronic cruise with buffet and port transfers covers multiple islands in a single day — a useful way to get a sense of the archipelago before committing to a longer stay on any one island.

If you have two or more nights: the Cyclades decision

The Cyclades are where most first-timers want to go, and for good reason: the whitewashed architecture, the iconic views, the blue-domed churches are all real. But the islands within the Cyclades are genuinely quite different from each other.

Santorini is the postcard: the caldera, the sunsets, the cliffside villages of Fira and Oia. It’s more romantic, more photogenic, more expensive, and in peak season significantly more crowded. A first trip to Santorini with good planning can be exceptional. See the Santorini highlights and wine tasting tour and the dreamcatcher sunset sailing cruise in the caldera — the highlights tour including Oia sunset and the sunset sailing experience are both worth booking in advance.

Mykonos is the party island, but not exclusively. Mykonos also has the ancient sacred island of Delos accessible by short boat, excellent beaches, and genuine charm in the old town outside high season. It skews younger, louder, and more nightlife-oriented than Santorini. Read the Santorini vs Mykonos guide for the full comparison.

Paros and Naxos are the quieter, more local alternatives if you want something less packaged. They don’t have the iconic imagery of Santorini, but they have better beaches, more affordable accommodation, and a more genuinely Greek atmosphere. Worth considering for a second or third trip, when the postcard images feel less mandatory.

Ferry vs flight

From Athens (Piraeus port), ferries to Santorini take about five hours on the high-speed catamaran or seven to eight on the slower conventional ferry. To Mykonos, around two to five hours depending on the service. These are not uncomfortable journeys — the high-speed catamarans are modern and air-conditioned — but they do eat into your island time, and sea conditions in summer (particularly the meltemi wind in July and August) can make the catamaran route choppy.

Flights from Athens International Airport to Santorini or Mykonos take 45 minutes and often cost €40–90 each way if booked in advance. For a first trip, if your budget allows, flying one way and ferrying the other gives you the best of both experiences. Book domestic flights two to three months ahead in summer.

The Saronic islands as a gentler introduction

If the Cyclades feel like a lot — logistically, financially, or emotionally — the Saronic Gulf islands are worth considering as a more measured introduction to the Greek island experience.

Hydra is the standout. No motor vehicles, no mopeds, just donkeys and foot traffic on cobblestone paths. The main port town is elegant — neoclassical stone mansions built by 18th-century shipping merchants, a harbour full of caïques, cats sleeping on every available surface. The swimming is from flat rocks and small coves around the island perimeter. It’s a day trip that feels complete in itself.

Aegina is the most easily reached (fastest ferry) and has a genuine local town life that’s not primarily oriented toward tourism — plus the beautiful Doric Temple of Aphaia, one of the best-preserved ancient temples in Greece.

How to decide

Use this filter: what do you actually want the island experience to look like?

• Iconic views and romance: Santorini
• Nightlife and beaches: Mykonos, with Delos as a cultural counterweight
• Local, quiet, authentic: Hydra or the Saronic islands
• Historical depth: Mykonos (for Delos), or Aegina (for Temple of Aphaia)
• Limited time or budget: Hydra as a day trip from Athens

Read the Greek islands from Athens guide for ferry schedules, booking tips, and a fuller breakdown of each option. If you’re also deciding between day trips on the mainland, the day trips from Athens overview covers Delphi, Meteora, and Cape Sounion alongside the island options.

The ferry experience itself

Getting to the islands from Athens means getting to Piraeus port — about 45 minutes by metro from central Athens on line 1. Piraeus is one of the busiest ports in the Mediterranean, and navigating it for the first time can be disorienting. Ferries to different islands leave from different gates; the gates are numbered, and your ticket will specify which one. Arrive at least 30 minutes before departure; 45 minutes for high-speed catamarans.

High-speed ferry vs conventional: the high-speed catamarans are faster (Santorini in 5 hours vs 7 on the conventional ferry) but more expensive and more affected by choppy seas. In July and August, the meltemi wind (a strong northerly that’s a feature of Aegean summers) can make the catamaran route genuinely uncomfortable and occasionally results in cancelled sailings. The conventional ferries are slower but more stable and have outdoor deck space that makes the journey pleasant on a calm day. For a first ferry trip to the islands, the conventional ferry is the lower-stress option unless time is the primary constraint.

Combining islands

If you have five or more days for the island portion of your trip, combining Santorini and Mykonos is straightforward — there are ferries between them (roughly 2 hours on the high-speed route). A classic itinerary: Athens for 2 nights, Santorini for 2 nights, Mykonos for 2 nights, return to Athens via ferry or flight. This works well and gives you both islands without the exhaustion of back-to-back travel days.

For the islands from Athens guide with specific ferry operator information, booking advice, and seasonal timing, see Greek islands from Athens. The islands overview also covers options beyond the Cyclades — including the Ionian islands (Corfu, Kefalonia, Lefkada) for those with a car or a tolerance for longer ferry journeys.

What an island adds to an Athens trip

Athens without any island time is a very good trip. Athens with two or three nights on an island is something more rounded — a Greece trip rather than an Athens trip. The contrast between the city and the islands is part of the point: the density and history of Athens against the space and sea-light of the Aegean.

The practical question for most visitors is whether to spend more time in Athens or split that time with an island. The honest answer depends on what’s driving the trip. If you’re primarily here for the ancient history, extra Athens days — including a day trip to Delphi or Cape Sounion — may serve you better than a brief island hop. If the sea and the island atmosphere are a core part of why Greece called to you, even two nights on Hydra or Santorini will feel more satisfying than two more days in the city.

Both are valid. Neither is the “wrong” choice. But knowing which type of traveller you are before you start booking makes the itinerary decisions much cleaner.

For the full logistics of getting from Athens to any island — ferry operators, booking platforms, seasonal schedules — the Greek islands from Athens guide is the reference to use. And the day trips overview covers the island excursions (Hydra, Saronic cruise) that don’t require an overnight at all.

The islands are not interchangeable. The right choice is the one that matches your actual travel temperament — not the one that photographs best on social media.