How far in advance should I book the Mykonos to Delos Boat — Day Trip ferry?

For July and August, book this route 3–6 weeks in advance. For May, June, September and October, 1–2 weeks is usually sufficient. Cabin berths on overnight ferries fill fastest — book as early as possible if you need a specific cabin class. Check the Teleporio Score before booking to identify the best departure window.

What happens if the Mykonos to Delos Boat — Day Trip ferry is cancelled due to bad weather?

When a Greek ferry is cancelled due to weather, operators are required to offer a full refund or rebooking on the next available sailing. You are not entitled to compensation for consequential costs such as hotels or flights missed as a result. Always build a buffer day before any onward flight or transport connection when island-hopping in summer, particularly on routes exposed to the Meltemi wind.

What is the Beaufort scale and how does it affect the Mykonos to Delos Boat — Day Trip crossing?

The Beaufort scale measures wind force from 0 (dead calm) to 12 (hurricane force). For Greek ferry travel, Beaufort 1–3 is ideal. Beaufort 4–5 means noticeable swell and possible motion sickness on smaller vessels. Beaufort 6–7 causes delays and cancellations on catamarans and hydrofoils. Beaufort 8 and above grounds most island ferry services completely. Teleporio’s Beaufort score factors current and forecast conditions into every route recommendation.

Teleporio™ — Greek Island Travel Intelligence

Mykonos to Delos Day Trip Guide

Plan the Mykonos to Delos boat day trip. 20-30 minutes to the sacred island of Apollo. Seasonal schedules, visiting hours, what to see and route planning tips.

Teleporio™ travel intelligence — Updated 2026-07-24

Analyzing real-time weather risks, vessel tracking thresholds, and luxury multi-modal transfer alternatives to ensure seamless island transit planning.

The Mykonos to Delos Crossing

organised day-trip boats depart from Mykonos Old Port (near the town waterfront) to Delos — the uninhabited sacred island and UNESCO World Heritage Site; Delos is not accessible by regular ferry — only organised day-trip boats, as overnight stays are prohibited; boats depart in the morning and return in the afternoon

The crossing takes 30 minutes by day-trip boat from Mykonos Old Port. several morning departures daily (approximately 09:00–13:00); all return in the afternoon (approximately 12:00–15:00); no evening services

Sea Conditions and Beaufort Exposure

the channel between Mykonos and Delos is Meltemi-exposed; afternoon wind can cancel boats; morning departures are the reliable window and the only option as boats return before the afternoon Meltemi builds; Beaufort 5+ can cancel services entirely

Booking and Tickets

buy tickets at Mykonos Old Port on the morning of travel — advance booking is not typically needed except in peak August; bring water (nothing available on the island), sunscreen, a hat, and walking shoes; the archaeological site entry is separate (approximately €12 at the site gate); budget 3 hours minimum on the island

Arrival

Delos is entirely uninhabited — there is a small museum, toilets, and a water fountain at the site entrance but no food or drinks for sale; the site is extensive (the entire island is an archaeological zone); the summit of Mt Kynthos (112 metres) gives a panoramic view over the ancient city and the surrounding Cyclades islands

Planning the Mykonos to Delos Crossing

Check the Teleporio Score for your chosen departure time the morning of travel — conditions on the same route can vary significantly between an early morning and an afternoon sailing, particularly when the Meltemi is active in July and August. Book ferry tickets at least two to four weeks in advance for summer travel: this route sees high seasonal demand and cabin berths on overnight services sell out weeks ahead. If connecting onwards from Delos, build at least one buffer day into your itinerary — a Beaufort delay without flexibility can cascade into missed accommodation bookings and additional costs downstream.

What Experienced Travellers Know

Morning crossings are more reliable than afternoon sailings in July–August Meltemi season — book the 07:00 or 08:00 departure when conditions look marginal
Conventional ferries handle rough sea conditions better than catamarans — match your vessel type to the Beaufort forecast before committing to a ticket
Arrive at the departure gate at least 45 minutes before conventional ferry sailings, and 90 to 120 minutes before departure if travelling with a vehicle
A Beaufort delay at Mykonos is significantly less stressful with one buffer night planned into the itinerary than without any margin at all

Greek ferry tickets are specific to the vessel and date — they are not interchangeable between operators or sailings. Your ticket names the ferry, the boarding gate, and your class. At major ports like Piraeus, gate areas are spread across several kilometres of waterfront, and arriving at the wrong gate with minutes to spare is one of the most common and avoidable boarding errors. Always check the specific gate number from the port departure board on arrival — gate assignments occasionally change with vessel substitutions, and a board check takes thirty seconds.