Ferry booking in Greece
There is no Greek national ferry company. That single fact explains almost everything that confuses people about booking a boat in Greece.
Routes are run by a couple of dozen competing private operators, each publishing its own schedule on its own timetable, each selling through its own channels and a shifting set of agents. No website has all of it. The aggregators are useful and they are not authoritative, because the authority does not exist.
So the skill here is not finding the right site. It is understanding the system well enough to know when the site is wrong.
Schedules appear in stages, not all at once
Operators publish the following summer gradually, roughly from November through to May. Mainland-to-island routes come first, inter-island routes later, and the small seasonal links last of all.
This is why an itinerary built in January often cannot be booked in January. The boat you need may well run — it ran last year — but nobody has filed the timetable yet.
The practical consequence: if a connection you need does not appear, that is not proof it does not exist. Check what ran on that route last summer, then check again in March. Do not redesign the whole trip in February.
Two kinds of boat, and the choice matters more than the price
Conventional car ferries are large, slow, stable and cheap. They carry vehicles, they have deck seating and open decks, they have a canteen, and they keep running in weather that stops everything else. On a long crossing they are genuinely pleasant.
High-speed catamarans are considerably faster, considerably more expensive, have no open deck to speak of, and slam. In any real swell they are unpleasant, and for anyone prone to seasickness they are a mistake dressed up as an upgrade.
The speed difference is real and sometimes decisive. But choose the conventional ferry by default, and pick the fast boat only when the time saved changes what you can do with the day.
There is a reliability difference too, and it is the more important one.
The meltemi is a planning constraint
The meltemi is the strong northerly summer wind that blows down the Aegean. It can turn up any time from June to September, and it peaks in July and August — the exact weeks most people visit. At its strongest it reaches force 7 to 8 on the Beaufort scale and occasionally more.
Fast craft are the first thing cancelled. They are typically pulled at around force 6 to 7, while the big conventional ferries carry on and generally only suspend at force 8 and above. Port authorities issue sailing bans and the operators have no discretion.
This is not a rare event. It is a normal feature of a Cycladic August, and it happens several times a season.
Two rules follow from it, and they are the most valuable thing in this guide.
Book the conventional ferry on any leg you cannot afford to lose. And never plan to fly home the same day you sail back from an island — leave a full night on the mainland. A cancelled sailing costs you a day; a cancelled sailing on the morning of an international flight costs you the flight.
Athens has three ferry ports
Booking the wrong one is the most common and most expensive error in Greek ferry travel, because they are an hour or more apart and you will not discover the mistake until the morning you travel.
Piraeus is the main port and the one most people mean. It handles Crete, the Dodecanese, the Saronic islands, the North Aegean and most of the Cyclades.
Rafina is on the east coast, closer to Athens airport than to central Athens. It serves Mykonos, Tinos and Andros with fast, direct connections, and for those islands it is often the better choice — particularly if you are flying in and out.
Lavrio is further down the same coast and much smaller. It is the port for Kea and Kythnos and serves a scattering of other Aegean destinations.
Read the port name on your booking, not the city. Then work out the transfer time from where you are actually staying, at the hour you actually need to travel, which for an early sailing is not the hour the timetable app assumes.
Piraeus is a small city, and the gate matters
Piraeus is not a building. It is a working port ringed by numbered gates, running from E1 upward, spread over several kilometres of quay.
Arriving at the metro station and walking to the wrong gate can cost you forty minutes and the boat. The gate is normally shown on your ticket and confirmed on the day, and it can change — it is assigned by destination and by which berth is free.
Check the gate the night before, check it again on arrival, and allow more time than seems reasonable. Free shuttle buses run around the port; find out whether yours is one of the gates they serve.
The standard advice is to be at the port at least an hour before departure, and for a vehicle or an international sailing, more.
Tickets, QR codes and the paper habit
Greek ferries used to require you to exchange your e-ticket for a paper boarding pass at a port kiosk before boarding. That requirement has been steadily relaxed and most major operators now accept a QR code on your phone.
It has not been relaxed everywhere. As of mid-2026 at least one significant operator, Fast Ferries, still requires a printed ticket, and some smaller local companies do too — and this changes how early you must arrive, because a kiosk queue at 07:00 in August is not quick.
Check the specific operator’s rule when you book, not when you arrive. If in doubt, print it. A sheet of paper costs nothing and removes the entire problem.
Vehicles, bikes and foot passengers
If you are taking a car, book it well ahead — two to three months for August, and earlier for the popular Cycladic routes. Vehicle deck space is a hard physical limit and it sells out long before passenger space does.
Foot passengers have it far easier. Deck-class capacity on a large conventional ferry is enormous and genuinely rarely sells out, which means a foot passenger can usually improvise. That flexibility is worth a lot in a windy August, and it is a real argument for not taking a car at all.
Bicycles are usually carried for a small fee and generally need to be booked with the vessel rather than turned up with. Scooters and motorbikes book like cars.
Deck, seat or cabin
On the short Cycladic hops, deck class is fine and the open deck is the best place on the boat.
On the long overnight runs — Crete, Rhodes, the Dodecanese — the choice is real. Deck class means finding a seat in a lounge or on the floor. A numbered airline-style seat guarantees you somewhere specific. A cabin gets you a bunk, a lock and a shower.
For an overnight crossing before a day you care about, book the cabin. The gap between deck and an inside four-berth cabin is not large, and cabins are the thing that sells out first on those routes in high season.
One note on rail passes: the Eurail Greek Islands Pass, in its 4- or 6-travel-day shapes, is valid only on Attica Group vessels — Blue Star, Hellenic Seaways and Superfast — with a discount on further Attica sailings. That is a substantial network but it is one company group among many, so it constrains your route rather than freeing it. Check it covers your islands before you buy it.
The exception: do not build a chain
This is the most useful thing here, and it is the advice people ignore most reliably.
Two islands in a week is comfortable. Three is work. Four is a logistics job that one cancelled sailing destroys, and every leg you add multiplies the number of ways the week can fail rather than adding to it.
Island hopping looks like a string of short journeys on a map. In practice each hop costs you a morning of packing, a transfer to the port, an hour of waiting, the crossing itself, and an afternoon of finding the next place — most of a day, for a crossing that takes two hours.
Pick fewer islands and stay longer on them. Then leave a full buffer night on the mainland before an international flight, and treat that night as part of the trip rather than a waste of one.
How we make money on this
The advice above is to book fewer crossings, take the cheaper conventional ferry over the expensive fast boat, and consider leaving the car at home — all of which earn us less than the alternative.