Fjords in summer, South America in winter, with the largest spa in the Costa fleet.
Best for: Families and spa lovers who want a big, well-priced Costa ship on the Norwegian fjords in summer or a South America season from Brazil, Argentina and Uruguay in winter. Sails from Kiel, Copenhagen, Savona, Marseille, Barcelona, Santos, Itajaí, Buenos Aires, Montevideo in 2026 and 2027.
Costa Diadema was delivered by Fincantieri in October 2014 as the largest ship ever built for Costa at the time and the only Dream-class hull in Costa colors. At 132,500 gross tons with 1,862 staterooms, 756 of them with balconies, she carries about 3,700 guests at double occupancy. Her signature is the Solemio Spa, 7,800 square meters spread over several decks with a thalassotherapy pool, sauna and Turkish bath, the largest in the Costa fleet.
Costa counts eight restaurants and snack bars and 11 bars and lounges, including the Carlsberg Country Rock Club with live rock and beer cocktails, a Teppanyaki restaurant, the Pummid’Oro pizzeria, the Aperol Spritz Bar, the Bollicine bar for Ferrari Trentodoc sparkling wine and a real German pub. Three pools, one under a retractable glass roof, eight whirlpools, a 4D cinema and an entire deck for children with a castle and a pirate galleon round out a ship built for families.
In 2026 Costa Diadema sails seven-night Norwegian fjord cruises from Kiel and Copenhagen through mid-September, then short and longer Western Mediterranean cruises from Savona, Marseille and Barcelona that reach Portugal, the United Kingdom and Morocco. From late November 2026 to early April 2027 she is Costa’s South America ship, sailing from Santos, Itajaí, Buenos Aires and Montevideo, before a transatlantic crossing back to Kiel for a summer 2027 of Northern Europe cruises.
Solemio Spa of 7,800 square meters with sauna, Turkish bath, thalassotherapy pool and treatment rooms with sea views
Carlsberg Country Rock Club with live rock, craft beer cocktails and burgers
An entire deck for children with a Castle and a Pirate galleon, plus a kids’ pool with water slide
Three pools including one under a retractable glass roof, and eight whirlpools
Teppanyaki, Pummid’Oro pizzeria, Gelateria Amarillo and the DiVino Gran Duca di Toscana wine bar
4D cinema, arcade games room, multisport court and an outdoor jogging track
Norwegian fjords from Kiel and Copenhagen in summer, Brazil, Argentina and Uruguay in winter
756 balcony cabins and 1,862 staterooms in all
Staterooms and suites
Interior
Costa’s practical, minimalist cabin for guests who spend their days on deck and in port; many sleep three or four on a sofa bed or pull-down berths, and a small number are sold as single cabins.
Ocean View
A picture window on a new fjord or Brazilian beach each morning; a bright mid-priced choice for couples.
Balcony
756 balcony cabins with a private veranda, the best seat for sailing Geirangerfjord or the Rio approach; some are Cove Balcony cabins set low on the hull close to the water.
Spa cabins
Interior, balcony and suite cabins located near the Solemio Spa and sold with spa inclusions such as access to the thermal area and the spa restaurant; book these if the 7,800-square-meter spa is the point of the trip.
Suites
Suites and Grand Suites with separate living areas and large balconies; Costa suite guests receive a welcome bottle, a private butler, a reserved table every evening in the Élite Suite & Club Restaurant and other courtesies.
Costa Diadema deck plans
Deck by deck, straight from our booking engine: the plan, the stateroom categories on that deck and the public rooms. Pick a deck.
La Fenice Deck 15
Lido Burmese Rose. Solarium.
SolariumThe perfect place where to sunbathe, drink a cocktail and chat with your friends. There are so many solariums on board: by the pool, on the highest deck of the ship, or at the stern, to admire the wake of the ship while sailing ... Spread the towel on your sunbed and enjoy the sun!
Millennium Star Deck 14
Winter Garden, Gymnasium, Waterpark, Solarium, Centro Benessere Samsara, Pista Da Jogging, Camp Da Gioco.
Winter GardenRecharge your batteries in the morning at one of bars and enjoy the freshest produce at breakfast and the finest coffee blends. Relax and cool off with a perfect cocktail inlounge.
Open for: Breakfast
GymIf you are sporty, you can keep in shape in the gym equipped with the latest equipment and large windows that overlook the sea. Run on the treadmill or follow your regular routine admiring the endless expanse of the sea in front of you, giving a feeling of absolute well - being and pushing you to improve your performance. The Costa gyms are equipped with the most modern equipment and are an invitation to stay fit, even for the laziest. You can also have a personal trainer or attend group spinning classes and relaxing yoga and Pilates classes.
Jogging trackFollow the jogging route as the ship moves in the direction of the next destination is just a great feeling. Take the route along the ship from bow to stern when running, passing from port to starboard, in sync with your sense of wellbeing. Breathe in the sea air as you monitor your workout. This is one of the best feelings for an athlete, in addition to physical exercise, it will seem as though you are running along the edge of the horizon.
SolariumThe perfect place where to sunbathe, drink a cocktail and chat with your friends. There are so many solariums on board: by the pool, on the highest deck of the ship, or at the stern, to admire the wake of the ship while sailing ... Spread the towel on your sunbed and enjoy the sun!
Stella D'Africa Deck 12
GS Grand Suite with Ocean view BalconyI3 Inside CabinI4 Inside CabinB3 Balcony CabinB4 Balcony Cabin
Indoor Peppa Pig AreaAn area completely dedicated to playtime for families with children from 6 months to 3 years old. The little ones will have the opportunity to have fun with their parents in a room entirely dedicated to them.
Restriction: 6 months to 3 years
DiscoWith the bass turned up and the silence of the sea outside the windows at night, only on a Costa ship. For those who love to dance all night, the nightclub is the last rendezvous of the day. This is where the music is addictive, and dance music lovers can enjoy it and dance on the sea until dawn. Nothing is more fun or romantic. Make new friends to the wild rhythm of the night. Fun is turned all the way up and makes you feel a part of a great night out and then, while everyone is asleep, you can watch the sunrise over the sea.
Timur Deck 11
GS Grand Suite with Ocean view BalconyI3 Inside CabinI4 Inside CabinB3 Balcony CabinB4 Balcony Cabin
Balcony DianaOpen air space where you can enjoy a fantastic view of the sea and entertain yourself with team games and table soccer.
Squok ClubSquok Club
SolariumThe perfect place where to sunbathe, drink a cocktail and chat with your friends. There are so many solariums on board: by the pool, on the highest deck of the ship, or at the stern, to admire the wake of the ship while sailing ... Spread the towel on your sunbed and enjoy the sun!
Star LaserAn ideal location to celebrate birthdays and private events with its 262.47 square feet of special effects: 60-inch monitor, laser lights, and a high-quality sound system for all ages. This fun and high-tech environment has many choices for your various requests.
DiscoWith the bass turned up and the silence of the sea outside the windows at night, only on a Costa ship. For those who love to dance all night, the nightclub is the last rendezvous of the day. This is where the music is addictive, and dance music lovers can enjoy it and dance on the sea until dawn. Nothing is more fun or romantic. Make new friends to the wild rhythm of the night. Fun is turned all the way up and makes you feel a part of a great night out and then, while everyone is asleep, you can watch the sunrise over the sea.
Lido DianaThe pool decks are the place of fun and the meeting place par excellence, where you can make new friends while sipping a drink.
PizzeriaPizzeria.
Corona Blu Restaurant Dining at Corona Blu Restaurant.
Open for: Dinner
Stella Del Sud BarStella Del Sud Bar.
Bizantino Deck 9
Staterooms.
S Suite with Ocean view BalconyI3 Inside CabinI4 Inside CabinE2 Oceanview CabinB3 Balcony CabinB4 Balcony Cabin
Star of India Deck 8
MS Mini Suite with Ocean view BalconyI3 Inside CabinI4 Inside CabinB3 Balcony CabinB4 Balcony Cabin
Conde Deck 7
MS Mini Suite with Ocean view BalconyS Suite with Ocean view BalconyGS Grand Suite with Ocean view BalconyI2 Inside CabinI3 Inside CabinE2 Oceanview CabinB2 Balcony CabinB3 Balcony Cabin
Braganza Deck 6
MS Mini Suite with Ocean view BalconyI2 Inside CabinI3 Inside CabinI4 Inside CabinE2 Oceanview CabinB2 Balcony CabinB3 Balcony Cabin
Eldorado Deck 5
Emerald Theater, Gelato Bar, Country Rock Club, Cigar Lounge, Club Diadema Restaurant, Samsara Restaurant, La Pizza, Golden Jubliee Casino, Beer Garden, Cinema 4D, Vinoteca Gran Duca di Toscana, Piano Bar Principe Nero, Salone Teodara, Bar Teodara, Gelateria Amarillo, Atrio Eliodoro, Sala Carte, Bar Bollicine, Tavola Teppanyaki, Terrazza Sinistra.
Emerald TheatreAt the theater, for example, where the artists make you laugh, dream, emote, with engaging entertainment aimed at even the smallest to enjoy, and during the most important moments of the cruise.
Gelateria AmarilloA creamy homemade ice cream or some delicious chocolate praline? No one can resist the delicacies of the Ice Cream Shop Amarillo.
Eliodoro AtriumOne of the ideal places to meet on board for a coffee or a cocktail with friends.
ArchipelagoThree visions blending into something new. Flavours, textures and presentations you won’t find anywhere else.
Sushino At CostaSushino at Costa is first sushi bistro on board and is designed to bring you an authentic Japanese experience that includes nigiri, maki, sashimi, and mochi.
Cuisine: Japanese
Open for: Lunch, Dinner
Teppanyaki RestaurantA different type of experience, spend a night in a soft environment in an Oriental style, where you can observe the craftsmanship of Japanese chefs. You can relax in the Japanese Teppanyaki restaurant to experience a different evening. The lounge area is decorated in an Oriental style, the atmosphere and the dishes are extremely elegant and refined. You can order light sushi, sashimi and many other oriental specialties prepared by the chefs.
Pizzeria Pummid'OroA 100% made in Italy pizza, with high - quality ingredients and the genuineness of dough made with leavening prepared with mother yeast. On board, a Costa ship is one place more than any other that makes you feel like you are in Italy. Pizzeria Pummid’oro, where you can eat the most famous Italian dish prepared strictly according to the original recipe. Spend a casual evening with friends or your family.
Golden Jubilee Casino
Gran Ducca Di Toscana Wine BarGran Ducca Di Toscana Wine Bar.
Piano BarThe tastiest way to start the night on a Costa ship? A good glass of red or white wine from our wine shops and bars.
Bar TeodoraBar Teodora.
Perla Di Venere Deck 4
Emerald Theater, Hospitality Area, Photo Area, Costa Travel Office, Orlav Grand Bar, Galleria Shops, Desiree Room, Tiara Room, Dresden Green Beer Garden, Florentino Atrium, Florentino Restaurant.
Emerald TheatreAt the theater, for example, where the artists make you laugh, dream, emote, with engaging entertainment aimed at even the smallest to enjoy, and during the most important moments of the cruise.
Eliodoro AtriumOne of the ideal places to meet on board for a coffee or a cocktail with friends.
Orlov Grand BarYou can find Italian taste on Costa ships every day at every appointment, in bars as well as on restaurant tables, thanks to selected products and brands.
Galleria ShopsYou can purchase beautiful gifts on board, and everything that you may need for your cruise.
Dresden Garden PubDresden Garden Pub.
Fiorentino Restaurant Breakfast, lunch and dinner are served at the table, the menu is a la carte, and at dinner a reserved table awaits you throughout your cruise. Here you can enjoy a wide selection of dishes prepared by our chefs every day.
Open for: Breakfast, Lunch, Dinner
Emerald TheatreAt the theater, for example, where the artists make you laugh, dream, emote, with engaging entertainment aimed at even the smallest to enjoy, and during the most important moments of the cruise.
Eliodoro AtriumOne of the ideal places to meet on board for a coffee or a cocktail with friends.
Eliodoro BarEliodoro Bar
Adularia RestaurantEnjoy a wide selection of freshly prepared dishes with an à la carte menu for breakfast, lunch, and dinner, all served at the table. A reserved table awaits throughout the cruise for dinner.
Open for: Breakfast, Lunch, Dinner
Fiorentino Restaurant Breakfast, lunch and dinner are served at the table, the menu is a la carte, and at dinner a reserved table awaits you throughout your cruise. Here you can enjoy a wide selection of dishes prepared by our chefs every day.
Open for: Breakfast, Lunch, Dinner
Plans are the cruise line’s current drawings as supplied to our booking engine. Layouts change with refurbishments; your SmartCruiser advisor confirms the exact stateroom when you book.
On board Costa Diadema
Adularia RestaurantBalcony DianaArchipelagoArcade Games RoomAquaparkAperol Spritz BarAmarillo Ice Cream Shop And Chocolate BarYogaWinter GardenWellness SpaVenus BeautyTheatre Show
Dining on Costa Diadema
Main restaurantsIncluded
Two main dining rooms serve Costa’s Italian and international menus with Destination Dishes tied to the ports on the itinerary.
Buffet restaurantIncluded
Self-service buffet for breakfast, lunch, dinner and late snacks with pizza, pasta and regional specialties.
Élite Suite & Club RestaurantIncluded
A la carte dinner served at a reserved table throughout the cruise for suite and club guests.
Pummid’Oro PizzeriaSpecialty
Pizza and mozzarella from selected ingredients and traditional recipes.
Teppanyaki RestaurantSpecialty
Japanese chefs cook at the grill in front of you in a soft, Oriental-style room.
Carlsberg Country Rock ClubSpecialty
Beers, beer-based cocktails, burgers and snacks with live rock music.
Gelateria AmarilloSpecialty
Homemade gelato and chocolate pralines, priced per item.
DiVino Gran Duca di Toscana, Bollicine Bar and Aperol Spritz BarSpecialty
Wines by the glass, Ferrari Trentodoc sparkling wine and the Aperol bar for the pre-dinner spritz.
Entertainment and activities
Theater with musicals, comedy, acrobats and game shows every evening
Carlsberg Country Rock Club live music, piano bar, disco and casino
Three pools, one under a retractable glass roof, and eight whirlpools
Solemio Spa with Technogym sea-view gym, yoga, Pilates and an outdoor jogging track
4D cinema and arcade games room
Multisport court for five-a-side soccer, volleyball, basketball and tennis
Sunset walks on the open decks and the Aperol Spritz Bar aperitif hour
Families and who it suits
The Squok Club looks after children aged 3 to 11 with supervised activities, the Squok Baby Area is a play space for parents and toddlers, a teen club covers 12 to 17 year olds, and the ship gives children an entire deck with a Castle, a Pirate galleon and a kids’ pool with a water slide.
Best for: Families and spa lovers who want a big, well-priced Costa ship on the Norwegian fjords in summer or a South America season from Brazil, Argentina and Uruguay in winter.
Sails from: Kiel, Copenhagen, Savona, Marseille, Barcelona, Santos, Itajaí, Buenos Aires, Montevideo · Regions: Norwegian Fjords and Northern Europe, Western Mediterranean, South America
Days ashore
Shore excursions in Costa Diadema’s upcoming ports
The ports on Costa Diadema’s next sailings. Pick one to see the tours Shore Excursions Group runs there, book before you sail and skip the line at the pier.
Ports from sailings departing Oct 28, 2026 onward; itineraries vary by date and your SmartCruiser advisor confirms the ports for your sailing. Tours are sold and operated by Shore Excursions Group, an independent tour company; SmartCruiser earns a commission on bookings made through these links at no extra cost to you.
Costa Diadema questions we answer every day
How big is Costa Diadema?
Costa Diadema is 132,500 gross tons and about 1,004 feet long, with 1,862 staterooms, 756 of them with balconies, and a crew of about 1,250. Costa lists about 3,700 guests at double occupancy and 4,947 at maximum. Delivered by Fincantieri in 2014, she was Costa’s largest ship until the LNG-powered Costa Smeralda arrived in 2019.
Where does Costa Diadema sail in 2026 and 2027?
Summer 2026 is seven-night Norwegian fjord cruises from Kiel and Copenhagen to Bergen, Stavanger, Flåm, Ålesund and Geiranger through mid-September, followed by Western Mediterranean cruises from Savona, Marseille and Barcelona. From November 26, 2026 she sails South America from Santos and Itajaí, with seven-night cruises to Buenos Aires and Montevideo from December 20, then crosses back to Kiel in April 2027 for another Northern Europe summer.
What is the spa like on Costa Diadema?
The Solemio Spa covers 7,800 square meters, the largest in the Costa fleet, with a sauna, Turkish bath, thalassotherapy pool, treatment rooms with sea views and a beauty salon. The Technogym sea-view gym, yoga, Pilates and fitness classes and the outdoor jogging track are included in the fare; thermal access and treatments are extra unless you book a Spa cabin.
Which cabins are best on Costa Diadema?
A Balcony cabin is the pick for the fjords and the Rio approach, and Cove Balcony cabins sit low near the water for a different view. Spa cabins near the Solemio Spa bundle thermal access, and Suites add a butler, a welcome bottle and a reserved table in the Élite Suite & Club Restaurant. Interior cabins that sleep three or four keep family fares low.
What is included in the fare on Costa Diadema?
The fare covers the main restaurants, buffet, theater shows, pools, the kids’ deck and Squok Club and the Technogym gym. Costa adds a nightly service charge, and specialty dining such as Teppanyaki and the Country Rock Club, drinks, Wi-Fi, the 4D cinema and spa treatments are extra unless packaged. SmartCruiser adds bonus onboard credit on sailings where Costa allows it, not available when you book direct.
Is Costa Diadema good for families?
Yes. Costa gives children an entire deck with a Castle and a Pirate galleon, a kids’ pool with a water slide, the Squok Club for ages 3 to 11, a Squok Baby Area for toddlers and a teen club. Three pools, eight whirlpools, the 4D cinema and arcade fill sea days, and many cabins sleep four. Expect a mostly European and, in winter, South American crowd.
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Prices are per person, double occupancy, in US dollars, and include cruise fare, taxes, fees and port expenses as published by the cruise line at the moment you load this page. Fares are capacity controlled and change daily; the fare is confirmed when you book. Flights, hotels and transfers are extra unless the line’s offer says otherwise. Onboard credit shown on a sailing is per stateroom and applies to the lowest category offered unless stated otherwise.
