Costa Diadema

From the thrill of the theatre, which plays hosts to an array of musicals, acrobatics, games and shows, to the pleasure of watching the sunset while drinking a refreshing Aperol Spritz, Costa Diadema has all of this and more.

Little ones will be delighted to discover a whole deck dedicated to them, where they can play in a Castle and even an adventurous Pirate Galleon. Adults meanwhile can surrender to a menu of relaxing treatments at the beauty spa or keep fit with a gym offering inspiring ocean views.

As night falls, the casino calls with myriad games, slots and tables to infuse your evenings with excitement, while international beers and cocktails await at the Birreria and Aperol Spritz Bar. And with a choice of 8 restaurants, each day is sure to be a delicious one.

  • Occupancy 4947
  • Tonnage 132,500 tons
  • Length 1,004 ft (306.00 m)

Deck Plans

Zoom in
Deck 1 - Excelsior
Deck 2 - Sara
Deck 3 - Centenary
Deck 4 - Perla Di Venere
Deck 5 - Eldorado
Deck 6 - Braganza
Deck 7 - Conde
Deck 8 - Star of India
Deck 9 - Bizantino
Deck 10 - Hortensia
Deck 11 - Timur
Deck 12 - Stella D’Africa
Deck 14 - Milleninium Star
Deck 15 - La Fenice

Life on board Costa Diadema

Make each moment of your cruise magical with a captivating array of delicious dining choices, fabulous facilities, and entertainment to delight.


Whether you choose the traditional authenticity of Italian pizza at Pummid’Oro Pizzeria, or marvel at Japanese craftsmanship in Teppanyaki Restaurant, you will find a range of dishes to enjoy.

  • Eight Restaurants and Snack Bars
  • 11 Bars and Lounges

Restaurants include:

  • Gelateria Amarillo
  • Pummid’Oro Pizzeria
  • Teppanyaki Restaurant

Bars include:

  • Birreria
  • Aperol Spritz Bar


Leap into action and enjoy a workout with a sea view at the gym, or ease into relaxation at the onboard beauty spa.

  • 11 Swimming Pools and Hot Tubs
  • Gym
  • Beauty Spa


Glittering nights await at the ship’s theatre, while the indoor Peppa Pig Area brings children and parents together in a range of fun activities.

  • Theatre
  • Indoor Peppa Pig Area

Cabins and Suites

With a choice of views, balconies, and charming indoor and outdoor spaces, you will find something to delight every taste.

Grand Suite

You multiply the privileges when you book a suite: comfortable and exclusive space on board. A place for private emotions which is welcoming and bright, a serene and sweet awakening; this is what you can expect in a Costa suite, with an exclusive package offering attentive touches, big and small. A bottle of sparkling wine to welcome you, a fruit basket replenished daily, Jacuzzi, bath salts, bathrobe and slippers, and, for an extra caress, the pillow menu for you to choose your favourite pillow.

Additional services provided:

• Dedicated butler

• Priority boarding and disembarkation, private VIP area in the terminal

• Every breakfast, lunch and dinner served in the restaurant reserved for suite guests

• “Connoisseur” drinks package

• Front row reserved in the theatre

• Personalised invitations to special events

• Special access for a whole day to the spa area of the ship

Balcony Cabins

Right up close to the sea: a room with a balcony overlooking the sea, where you’ll feel the warm wind in your hair and smell the intoxicating sweet scent of the salt water. All the comfort of a Costa cabin with your external balcony overlooking the sea. A real treat.

Outside/Ocean View Cabins

A window between sky and sea: Costa’s outside cabins offer more direct contact with the all the colours of your holiday. You can see the sea, enjoy the sunsets and sunrises – a warm embrace that makes our cruise even more romantic.

Inside Cabins

A cosy nest: experience Costa comfort and hospitality first hand with this type of cabin, suitable for those who want to spend a little less on their cruise, but who still don’t want to miss out on anything, or for whom the cabin is just somewhere to sleep and change, because they prefer to experience the ship to its fullest.

Costa Diadema FAQ's

Is there children’s entertainment on-board Costa Diadema?

Yes, the Squok Club keeps children from three to 11 entertained with activities throughout the day.

How many restaurants are there on-board Costa Diadema?

Costa Diadema has eight restaurants and snack bars.

How many balcony cabins are there on-board Costa Diadema?

Costa Diadema has 756 balcony cabins.

Is only Italian food served on-board Costa Diadema?

No, on board Costa Diadema you will find an array of international restaurants and cuisines in addition to typical Italian dishes.

Can I shop on-board Costa Diadema?

Yes, in the Galleria you will find an array of beautiful gifts and personalised services.

Can I find information on shore excursions whilst on-board Costa Diadema?

Yes, at the My Tours section, you will find information and guidance to help you plan your shore excursions with care.

Holiday Enquiries
Mon - Sun 9am-8pm

Request a Brochure

Enter your details below or call us on 0800 008 6677

Please select a valid form.

Enquire Now

Please select a valid form.

Sign up to our mailing list and stay up-to date with our latest offers.

By clicking subscribe you agree to our Cookie Policy and Privacy Policy

Powered by Verifalia email verification