There are daily boat excursions from Mykonos except Monday, because the archaeological site is closed that day. Boats leave at 9AM, 10AM and 11AM from the pier at the west side of the harbour, right behind the little church of Agios Nikolaos. The boat trip takes about 30 minutes. Boats return at 12:15PM, 1:30PM and 3PM. Boat trips to Delos are also organized from Platys Gialos and Paranga Beach. The excavations are open from 8:30AM to 3PM, so have an early start if you really want to see it all. The cost is €17 for the boat trip plus €5 for entrance (though free for students and €3 for those over 65). A guided tour, departing at 10AM from the pier in Mykonos, will cost € 40 (including boat trip and entrance fee).
The Cyclades are notoriously windy. As the boats going from Mykonos are relatively small, boat trips can be cancelled due to strong wind.
In summer routes are also available from Tinos, Naxos and Paros.
Only some small cruise ships dock at the commercial Delos port of call
