The Cyclades are a group of Greek Islands, located in the southern part of the Aegean Sea (south of Athens and north of Crete). The archipelago contains some 2,200 islands, islets and rocks; just 33 islands are inhabited. The Cyclades are best known for the islands of Santorini and Mykonos.
- Amorgos — has a famous monastery and just a few beaches
- Anafi — a small unspoiled island located east of Santorini
- Antiparos — a small island just west of Paros, relaxed and with nice beaches
- Andros — the second largest and most northerly island, traditional and tranquil, green and mountainous, with many beaches
- Delos — a small uninhabited island close to Mykonos, famous for its archaeological sites.
- Folegandros — a beautiful, quiet island to the west of Santorini
- Ios — famous as a young people's party island
- Kea — a quiet island popular mostly with vacationing Greeks, close to Athens but it feels remote
- Kimolos — small satellite island of Milos
- Little Cyclades — a group of small islands southeast of Naxos, including Ano Koufonisi, Kato Koufonisi, Iraklia, Schinousa and Donousa
- Milos — the least touristed of the larger Cyclades, volcanic with spectacular rock formations
- Mykonos — a popular tourist destination, with excellent beaches and the most vibrant night life
- Naxos — the largest and greenest island in the group, with excellent beaches
- Paros — a popular tourist island with attractive landscape and good beaches
- Santorini — a spectacular volcanic island, one of the most beautiful and romantic places in the world, with amazing landscape, unusual beaches and a vibrant night life
- Serifos — a small, quiet island with great beaches, traditional town
- Sifnos — a picturesque, quiet traditional island, with good beaches and walks
- Sikinos — a small rocky island with a few beaches and good walks
- Syros — a traditional island with Italianate architecture, large main town, good beaches
- Thirassia — a small satellite island of Santorini, with which it formed the same island until the huge volcanic eruption of 2nd millennium BCE
- Tinos — a traditional island, cathedral is major pilgrimage site, good beaches
Ermoupolis (Syros) is the capital of the Cyclades.
Most of the Cyclades have one main town which has the same name as the island. Some larger towns which have names of their own include:
- Fira — on Santorini island
- Oia — on Santorini island
- Ermoupolis — large port city on Syros
- Kamares — port of Sifnos
- Apollonia and Artemona — adjacent main towns of Sifnos
- Kastro — medieval town of Sifnos
The Cyclades are the Greece of the travel posters: bare rocky islands adorned with brilliantly white cubistic villages soaring on hills above the wine-dark sea, and fringed with terrific beaches. Since all the world has discovered this, they tend to be very crowded with visitors, especially in high summer. But most visitors feel the islands' attractions are worth putting up with the crowds.
Kyklos is the Greek word for circle. Because the islands are set up in a circle around Delos the islands are named Cyclades. The best time to visit the Cyclades is May through June (early season, accommodation is much cheaper and it's not that hot), or September through mid-October (post season). In high summer (July and August), though it's the most popular season, these islands for that reason get extremely crowded and hotel prices are at their highest; furthermore, the weather then can be very hot, and some islands may suffer water shortages. In the whole period mid-May through mid-October it's usually warm enough to enjoy the beaches, but in some years you risk unseasonably chilly weather at the beginning or end of this period. In October the weather changes and rain starts to fall. Ferry schedules are reduced out of season. The Cyclades are also famous for the constant wind (called meltemi) in July and August that mitigates the heat a bit.
Regular (mostly daily) flights from Athens to Mykonos, Paros, Naxos, Santorini, Milos and Syros operated by Olympic Air  and Aegean Airlines . In high season there are also less frequent flights from Rhodes, Crete (Heraklion) and Volos by Sky Express . From May till October charter airlines fly directly to Santorini and Mykonos from many European airports.
From the Greek mainland ferries and highspeed catamaran services  run daily from Piraeus, Rafina and Lavrio. Ferrys operate to all the islands in the Cyclades, some of the larger islands also have a highspeed catamaran service. Ferry trips are four to five hours to the closest islands (Kythnos, Syros, Tinos, Mykonos and Sifnos) and from eight to ten hours to the furthest (Santorini) depending on the number of stops. The highspeeds take half the time but cost twice as much. There are daily ferries from Piraeus to all of these islands, with the exception of Kea and Kythnos which you get to from Lavrio and Andros which you get to from Rafina.
Many travelers probably consider Rafina not a possible departure port if they are heading to one of the Cyclades, but if you are arriving at the airport of Athens, you are often better off taking a ferry from Rafina than traveling to Athens and get a ferry from Piraeus.
Many boat services stop working by end of October and resume by April. Check with the operator before making departure plans as the services are subject to delays and cancellations in adverse weather.
- Hellenic Seaways. There are two fast car ferries (Nissos Mykonos and Nissos Rodos) in addition to the high speed catamarans Highspeed 1, Highspeed 4, Highspeed 5, Highspeed 6, Flyingcat 3 and Flyingcat 4 " . "Deck class" is a cheapest way to go around the Cyclades, you can sleep outside, on the deck.
- Hellenic Seaways Express Apollon. Really old-fleet boats. Consider flying instead, even if it costs times more. Distinguished Class: first few cabins are really shaky (and hard-to-sleep in); too intensive conditioner in saloon. Take your tickets if you go to DC-saloon, other-class passengers are not allowed there. In Piraeus, the boat is ready for boarding 2 hrs before departure time. While in the port of Piraeus, you may leave luggage in your cabin in the port.
- Hellenic Seaways Highspeed. Bright red Vodafone-logo boats; most popular and recommended sea transport, at least to Santorini.
- Blu Star Ferries. They operate BlueStar 1 & 2, Blue Star Paros, Naxos and Ithaki from Piraeus plus Superferry I from Rafina 
- Aegean speed lines. The 3 Speed Runners are high speed ferries  operating from Piraeus to most of the Cyclades islands.
- Seajets. SuperJet  departs from Piraeus: Milos, Folegandros, Syros, Santorini, Koufonissi, Amorgos. SeaJet 2 departs from Rafina: Tinos, Mykonos, Paros.
Travel by ferry. They are safe, regular, cheap and fun. The biggest ferry hub within the Cyclades is in Paros which has links to many islands.
Be prepared that travelling by ferry can be tedious in high season when ferries are really crowded. Usually there are two types of ferries: The ordinary ones and the speedboats (hydrofoils, which are much more expensive).
Also, ferries may be cancelled due to sea and weather conditions so don't leave on the last ferry before your flight, especially if it is windy. Seas are calmer at night, so the late evening and early morning ferries are the most likely to operate.
Tickets for ferries can be usually bought from travel agencies which are located around the local port.
- Island hopping - this is very popular within the Cyclades. If you have more than one week, this might be an option for you since ferry schedules are excellent and every island has its own charm.
See Greece#Eat for more information on Greek cuisine.
If visiting in winter season, try Ρακόμελο (pronounced rakomelo). The local people drink this hot drink to warm them up on a cold day. Ingredients are raki, honey and hot water. Recommended that you only drink one or at most two. Drink three and you will be ready for bed!
The Cyclades are very safe. Travelers should exercise usual precautions.
Head on down to Crete when you are done with the Cyclades. If you have plenty of time you might want to go to other Greek islands belonging to the Dodecanese, the Ionian Islands or the Sporades as well.