Decision. Ferry by default: Piraeus for anything except Mykonos/Tinos/Andros, Rafina for those three because it is 30 minutes from ATH by KTEL bus at €4–5.50 [13]. Fly only when the crossing exceeds ~7 hours — Crete (7–13 h) and Rhodes (12–22 h) [4]. And never put the return leg on the day of your international flight home: a weather cancellation makes you a no-show and nobody pays [9].
The three ports
| Port | Serves | From ATH | From central Athens |
|---|---|---|---|
| Piraeus | Cyclades, Crete, Dodecanese, Saronic, NE Aegean [1] | Metro L3 ~60 min €9; X96 bus 90–120 min €5.50; taxi €50–58 day [11] [24] | Metro 15–25 min, €1.20 [1] [2] |
| Rafina | Andros, Tinos, Mykonos; summer Paros/Naxos/Ios/Santorini [1] | KTEL ~30 min, €4–5.50 cash [13] | KTEL from Pedion Areos ~70 min, €3 [2] |
| Lavrio | Kea, Kythnos; seasonal Andros/Syros/Milos [25] | KTEL ~60 min via Markopoulo, €4 [2] | KTEL from Nomismatokopiou ~2 h, €5.30 [2] |
Two fare traps. The airport metro is a separate zone starting at Doukissis Plakentias — €9 single / €16 return, and a normal €1.20 city ticket will not open the barrier [24]. The €40 taxi flat fare covers central Athens only; Piraeus is outside the zone, so the meter runs and you pay €50–58 by day [11]. The X96 runs 24 h from arrivals between Exits 4 and 5, every 30–40 min [12]; the Rafina KTEL leaves from Exits 2–3, roughly hourly, first 04:30 and last 23:00, cash only [13].
Piraeus gates and buffer
Piraeus has 12 gates (E1–E12) spread around a working harbour, and your gate is printed on the ticket [25]. Blue Star’s own port map shows the pattern: E1 for Santorini/Crete/Dodecanese sailings, E6 and E7 for Cyclades departures (E6 foot passengers, E7 passengers plus vehicles), E9 for Saronic high-speeds to Aegina, Hydra and Spetses [3]. Assignments shift in summer — confirm against the electronic boards on the day.
Buffer: 60–90 minutes at the gate [25], and 90 min–2 h door-to-departure from central Athens in July/August because ferries do not wait [11]. Coming off an international flight, allow ≥4 h to a Rafina sailing and ≥5 h to Piraeus [1].
Conventional vs high-speed
| Axis | Conventional (Blue Star, Minoan, Anek) | High-speed catamaran (SeaJets, Golden Star, Fast Ferries) |
|---|---|---|
| Piraeus→Santorini | 7 h 30–8 h, from ~€46.50 [18] | 4 h 50–5 h 35, from ~€79.70 [18]; 5 h 30 on WorldChampion Jet [21] |
| Piraeus→Mykonos | ~5–6 h [4] | 2 h 30–3 h [21] |
| Price | baseline | ~2× a conventional car ferry [7] |
| Seasickness | large, stable, open decks [23] | every wave felt, airline-style indoor seating, no deck [23] |
| Wind cancellation | sails in most conditions [10] | more affected; cancels first in a meltemi [10] |
| Sells out in Aug | deck seats rarely; cabins/cars do [7] | frequently [7] |
⚠ In a July/August meltemi the ~€35 you save by taking the catamaran buys you the rougher ride and the higher cancellation odds.
Meltemi, cancellations and what happens to the booking
The meltemi is a dry north wind blowing June–September, peaking July–August at 7–8 Beaufort and occasionally over 120 km/h; it strengthens mid-morning, eases by sunset, and runs in spells of up to a week [10]. Mykonos, Tinos and Andros take the worst of it [10]. Practical hedge: book morning departures and large ships.
When a sailing is cancelled, EU Regulation 1177/2010 gives you a choice of “reimbursement of your ticket within seven days, or re-routing to your final destination under comparable conditions at the earliest opportunity, at no extra cost” [9]. Weather counts as an extraordinary circumstance, so the operator owes you the fare or a seat — not your hotel, not your missed flight [9]. Refunds are not automatic; request one and keep the cancellation notice. Operators notify by email/SMS [7]. → Sleep in Athens the night before you fly home.
Booking and tickets
Book 2–3 months ahead for a July/August crossing, 3–4 months if you need a cabin or a car slot — cabins vanish first, and prices do not surge like airfares, so early booking costs nothing [8]. Blue Star deck seats rarely sell out; SeaJets seats, cabins and vehicle spaces routinely do in July–August [7].
Tickets. Blue Star web check-in opens 48 h and closes 2 h before departure, issuing a QR e-ticket you show with ID or passport — no printing needed [15]. If you skipped web check-in, collect paper at the port office with your reservation code up to 1 h before departure [14]. Smaller operators and third-party bookings are less forgiving — verify per operator, not per booking site.
Rental cars. Ferry travel needs the rental company’s permission in writing; fees run ~€30–74 and standard insurance may lapse while the car is at sea [16] [17]. Unauthorised crossings void all protection [17]. Island one-way drop-offs are almost never permitted — rent fresh on each island instead [16].
Representative routes, summer 2026
| Route | Duration / frequency | From (2026) |
|---|---|---|
| Piraeus → Aegina | 30 min–1 h 30 | €9.50 [4] |
| Piraeus → Hydra | 1–2 h | €15 [4] |
| Piraeus → Milos | 2 h 30–7 h 30 | €33 [4] |
| Piraeus → Paros | 2 h 45–5 h | €40.50 [4] |
| Piraeus → Naxos | 3 h 15–6 h | €42 [4] |
| Piraeus → Mykonos | 2 h 40–6 h | €43 [4] |
| Piraeus → Santorini | 3 h 55–8 h | €39 [4] |
| Piraeus → Heraklion | 7–13 h | €27.50 [4] |
| Piraeus → Rhodes | 12–22 h | €46.50 [4] |
| Rafina → Andros | up to 11 daily | €25 [6] |
| Rafina → Tinos | up to 12 daily | €30 [6] |
| Rafina → Mykonos | 2 h 05–4 h 40 | €35.50 [5] |
Flying instead
ATH–JTR is about 50 minutes in the air on Aegean, Sky Express, Volotea or Ryanair [18]. Aegean one-ways start at €50 (August 2026 calendar €50–106) [19]; Sky Express from €44, with August dates €52–99 [20]. That is the same money as a SeaJets seat [18] — the argument is time, not price.
Door-to-door, though, the 50-minute flight carries 90+ minutes of security and bag claim [25], plus the ATH transfer, plus the island end: JTR wants 1 h before a carry-on-only departure and 2 h+ with checked bags, and about 40 taxis serve the whole island at €30–45 to Fira or Oia [22]. Net: ~4 h door-to-door versus ~8 h by fast ferry from central Athens.
Rule of thumb
- Fast ferry to the near Cyclades (Paros, Naxos, Mykonos): half a day. Leave the hotel at 07:00, be swimming by 14:00.
- Any Piraeus→Santorini sailing: a whole day, conventional or high-speed — 8 h at sea plus 2 h of buffer and transfers [18] [11].
- Flight to Santorini/Mykonos: ~4 h door-to-door — half a day, saved only if you are already near ATH.
- Crete or Rhodes: fly, or accept an overnight ferry as the transfer and the hotel night [4].
On a 7-night trip, budget one full day per island change. Three islands means three lost days — two is the honest maximum.