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A Blue Star ferry crossing the deep blue Santorini caldera below the cliffs, with white villages along the rim.

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Athens to Santorini by ferry, and into the caldera

A day across the Cyclades, then the ship slips between Oia and Thirasia and sails into a drowned volcano.

The short answer

Blue Star sails from Piraeus to Santorini every day. Its conventional ferry takes 7 hours 45 minutes to 8 hours 5 minutes via Paros and Naxos, from €59 in economy for sailings in late October 2026, read on 19 October 2026; the numbered seats on the morning boat sell out first, so book those early. In summer the high-speed boats cut the time to about 5 hours 20 minutes from Rafina and 5 hours 35 minutes from Piraeus. Every boat docks at Athinios, the port below the cliffs, 20 minutes by bus from Fira.

No flight can do what the last half hour of this crossing does. After Paros and Naxos, the ferry turns through the gap between Oia and Thirasia and runs south inside the caldera, under cliffs of lava and ash with the white towns along their rim. You arrive at sea level and look up at the whole of Santorini at once.

Greece

Journey time
5h20 fast, 7h45 Blue Star
Fare from
€59 (Blue Star, Oct 2026)
Departures
Daily; fast boats in summer
Calls on the way
Paros, Naxos, some days Ios
The caldera
10 km by 7 km
Ports
Piraeus/Rafina to Athinios

Why this is one of the great crossings

Most of the way, this is a ferry ride through the Cyclades: a morning crossing to Paros, a short hop to Naxos past the marble gateway of Apollo's temple, the long blue stretch south. The reason people remember it comes at the very end, and it was made by a volcano.

In the Late Bronze Age, radiocarbon dated to 1627 to 1600 BC, Santorini blew itself apart in one of the largest eruptions since the last ice age, burying the town of Akrotiri under ash. The centre of the island collapsed, leaving the ring of Thera, Thirasia and Aspronisi around an empty bowl. Marine geologists who mapped the seabed found that the sea did not pour in during the eruption but afterwards, through a breach in the north: the water cut a channel 3 km long and 1 km wide and filled the caldera in less than a couple of days.

That breach is still the way in. Ferries coming down from the north pass between Oia and Thirasia and enter a basin about 10 km by 7 km, with the cliffs on one side and the black Kameni islands in the middle, built up by lava since the great eruption and last active between 1925 and 1950. A ship is the only way to see the caldera as a whole, from the inside, at the height of the water. Then it docks at Athinios, at the foot of the wall, and a road of hairpin bends climbs to the rim.

Along the way

  1. Piraeus

  2. Piraeus, the Cyclades gates

    Leaving Piraeus

    Piraeus is the largest passenger port in Europe, with about 20 million passengers a year by its port authority's count, short Salamis ferries included. The morning Blue Star sails at 07:25, so the first hour is breakfast on deck as Athens falls behind.

  3. First call, about 4 hours 10 minutes out

    Parikia, Paros

    The longest leg ends in Paros's harbour town at 11:35 on Blue Star's October 2026 timetable. Twenty minutes later the ferry is off again across the strait to Naxos, a 50-minute hop.

  4. Entrance to Naxos harbour

    The Portara, Naxos

    On the islet of Palatia, at the mouth of the harbour, stands a marble doorway with nothing behind it: the gate of a temple of Apollo begun around 530 BC under the tyrant Lygdamis and never finished. Its four marble pieces weigh about 20 tonnes each. It is the first thing you see of Naxos from the deck.

  5. Between Oia and Thirasia, on the final approach

    The northern strait

    The ship turns into the gap at the north end of the caldera. On the seabed below is the channel the sea cut when it rushed into the empty volcano after the Bronze Age eruption, 3 km long and 1 km wide. Oia sits on the cliff edge to your left, Thirasia to your right.

  6. Sailing south from Oia towards Athinios

    Inside the caldera

    The basin is about 10 km by 7 km. Imerovigli and Fira run along the rim on the left, white against the dark layers of the cliff, while the black lava of Nea Kameni rises in the middle on the right. Its last eruptions were between 1925 and 1950.

  7. Arrival, south of Fira

    Athinios and the road up

    The port is a strip of quay at the foot of the caldera wall. From it a single road climbs the cliff in hairpin bends, and the bus takes 20 minutes to reach Fira for €2.70.

  8. Santorini

Where to stand

Stand outside on the left (port) side from the moment the ship leaves Ios or Naxos for Santorini. Boats from the north enter the caldera between Oia and Thirasia and run south inside it, so Oia, Imerovigli and Fira pass along the left-hand rail, with Thirasia and the Kameni islands on the right. On Blue Star every ticket includes the open decks; the higher you stand, the more of the cliff you see. The October 2026 Blue Star arrives between 15:10 and 15:30, with the afternoon light on the cliffs; the evening sailings of Blue Star Chios arrive after dark, when you see the lights of the towns on the rim instead.

Ways to do it

When to go

Tickets, fares and what they include

How much is the ferry from Athens to Santorini, and what does the ticket include?

On Blue Star the cheapest ordinary ticket is economy, which buys passage with the run of the lounges and the open decks but no seat of your own. For a reserved seat, pay for a numbered airline-style seat or the Business lounge; for a bed, a cabin berth. Special Economy at €46.50 comes in a handful of tickets and had sold out on most morning sailings in late October 2026; the numbered seats had too on some days, so book a seat early if you want one. Luggage is free up to 50 kg or 1 cubic metre a passenger, stowed in the luggage areas the crew direct you to. Web check-in opens 48 hours before departure and closes 2 hours before. Fares below were read on 19 October 2026 for Blue Star sailings between 20 and 31 October 2026.

Economy (lounges and deck)
€59
Numbered airline-style seat
€64
Business lounge seat
€82
Berth in a four-bed cabin
from €92.50
Free luggage
Up to 50 kg or 1 m³ a passenger
Free cancellation, Blue Star high season 2026
Up to 14 days before departure (3 days in low season)

Piraeus, Rafina and Athinios

Which port do ferries to Santorini leave from, and how do I get from Athinios to Fira or Oia?

Most boats leave from Piraeus, the port of Athens. The metro and the suburban railway both run there from Athens airport, on an airport ticket costing €9. The port authority runs a free shuttle inside the port, which helps, because the gate is printed on your ticket and changes with the ship: Blue Star's port map puts its Paros, Naxos, Ios and Santorini boats at gates E6 and E7, but for every late October 2026 sailing its booking engine gave gate E2 for Blue Star 1 and E1 for Blue Star Chios. Blue Star asks passengers to be at the boarding area an hour before departure. Rafina, on the east coast of Attica, is the summer alternative for the Golden Star fast boat.

At Santorini every boat docks at Athinios, south of Fira at the foot of the caldera wall. The island bus company runs from the port to Fira in 20 minutes for €2.70, and also to Kamari, Perissa, Pyrgos and Karterados. For Oia, change in Fira: the Oia bus runs about every half hour through the day for €2.20.

Athens airport to Piraeus
Metro or suburban rail, airport ticket €9
Piraeus gates for Santorini
E6 and E7 on Blue Star's map; E1 and E2 in October 2026
Be at the port
1 hour before departure
Athinios to Fira
Bus, 20 minutes, €2.70
Fira to Oia
Bus about every 30 minutes, €2.20
Bus fares checked
Santorini bus timetable of 15 October 2026

The meltemi and cancellations

Do ferries to Santorini get cancelled because of the wind?

The Aegean's summer wind, the meltemi or etesian, blows from the north from early summer to early autumn and is at its most frequent and strongest in July and August. Most days it simply makes the crossing lively, but when it blows hard the port authorities can hold ships in port and the operators reroute. On 15 August 2026, SeaJets rescheduled sailings across its network because of the weather. If Blue Star cancels a departure for the weather, your ticket is exchanged for the next sailing, subject to space; SeaJets refunds the full fare when a sailing is prohibited.

Windiest months
July and August
Blue Star cancelled sailing
Ticket exchanged for the next departure
SeaJets prohibited sailing
Full fare refunded

Worth knowing before you go

The journey in pictures

The Blue Star Paros ferry loading at its berth in the port of Piraeus.
The Blue Star Paros ferry sailing into the bay of Parikia on Paros.
The Portara of Naxos framing the white town of Chora, with the Blue Star Delos in the harbour.
Passengers on the deck of a ferry moored in Parikia harbour, with the town and hills of Paros beyond.
The Blue Star Delos sailing through the Santorini caldera towards Athinios, under the dark volcanic cliffs.
A fast ferry leaving its wake across the Santorini caldera, seen from the clifftop near Athinios.
Athinios port at the foot of the cliffs, with the Santorini caldera and the Kameni islands beyond.

Questions people ask

Good questions about Athens to Santorini

How long is the ferry from Athens to Santorini?

Between about 5 hours 20 minutes and 8 hours 5 minutes, depending on the boat. Blue Star's conventional ferry from Piraeus takes 7 hours 45 minutes when it sails straight from Naxos and 8 hours 5 minutes when it calls at Ios first (October 2026 timetable). Its direct evening sailings take 5 hours 40 minutes to 6 hours 20 minutes. In summer the high-speed catamarans take about 5 hours 20 minutes from Rafina and 5 hours 35 minutes from Piraeus.

How much is the ferry from Athens to Santorini?

On Blue Star, economy from Piraeus cost €59 for sailings in late October 2026, read on 19 October 2026. That covers the lounges and decks; a numbered seat was €64, a Business seat €82 and a berth in a four-bed cabin from €92.50. A handful of Special Economy tickets at €46.50 appear on some sailings and sell out first. Golden Star lists its summer fast boat from Rafina from €65 on its route table. Luggage up to 50 kg is included on Blue Star.

Is it better to take the ferry or fly from Athens to Santorini?

The flight is quicker: about 50 minutes from Athens airport. The ferry takes 5 to 8 hours but brings you in at sea level through the caldera, with the whole island above you, and it lets you carry up to 50 kg of luggage on Blue Star. If you have the day, take the boat at least one way, ideally the 07:25 from Piraeus, which arrives in mid-afternoon light.

Should I sail from Piraeus or Rafina?

Piraeus has the year-round boats and the most departures: Blue Star every day, plus SeaJets' fast catamaran in summer. Rafina is 15 to 20 minutes from Athens airport, so in summer it suits travellers landing in the morning; Golden Star's Super Express leaves at 07:20 and reaches Santorini at 12:40. From central Athens, Piraeus is the simpler trip, at the end of the metro.

Which side of the ferry is best for arriving in Santorini?

The left (port) side. Ferries from the north enter the caldera between Oia and Thirasia and sail south inside it, so Oia, Imerovigli and Fira pass on the left, with Thirasia and the volcanic Kameni islands on the right. Go out on deck when the ship leaves Ios or Naxos, and find a spot high up on the left-hand rail for the widest view of the cliffs.

How do I get from Santorini port (Athinios) to Fira or Oia?

The island bus runs from Athinios up the cliff road to Fira in about 20 minutes for €2.70 (timetable of 15 October 2026). There are also buses from the port to Kamari, Perissa, Pyrgos and Karterados. For Oia there is no direct bus from the port: change in Fira, where the Oia bus leaves about every half hour through the day and costs €2.20.

Is there a ferry from Athens to Santorini in winter?

Blue Star describes Santorini as a daily route, and in late October 2026 there was a 07:25 departure from Piraeus every day plus evening sailings on Mondays, Wednesdays and Fridays. The high-speed boats are a summer service. The timetable from November had not been put on sale by 19 October 2026, so check the date you want before you plan around it.

Athens to Santorini

A day across the Cyclades, then the ship slips between Oia and Thirasia and sails into a drowned volcano.

Piraeus → Santorini

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Image credits: dronepicr (CC BY 2.0) · A.Savin (CC BY-SA 3.0) · Olaf Tausch (CC BY 3.0) · Manfred Werner (Tsui) (CC BY-SA 4.0) · Zde (CC BY-SA 4.0) · Tomisti (CC BY-SA 4.0) · Norbert Nagel (CC BY-SA 3.0)

Piraeus → Santorini

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