Live · sailing at 20 kn · Hellesylt
Guests
3,772 – 4,526
Crew
1,253
Cabins
1,886
Length
306 m
Space ratio
29
Homeport pattern
Savona
Where she is right now
En route · Hellesylt· 8/2/2026, 1:43:35 PM· Course 354°
Position
59.03°N, 4.18°E
Heading
354° · COG 358°
Speed
20 kn
Destination
Hellesylt
Our take · opinion
Italian Dream-class volume
Our take: Costa Diadema is Costa’s big Mediterranean showpiece—Dream-class bones wearing Italian polish. We’d put lively families and multi-gen groups here when they want European energy, spa cabins, and a ship that feels busy in a good way.
We experience Diadema as Costa at scale: busy atriums, Italian dining theater, and a guest mix that feels more Europe-at-sea than Florida megaship. Samsara Spa is the wellness spine, and the pool decks run high-energy on sea days. If you want hush this isn’t your ship; if you want buzz with mozzarella, gelato, and a lively evening circuit, she delivers that Costa identity in full for a Mediterranean week.
Cabins decide the trip more than the brochure photos. We’d book Samsara Spa staterooms when thermal-suite access and the spa restaurant matter, and we’d look hard at Cove Balcony rooms for a cheaper outdoor option before jumping to Grand Suites. Ask us about lower midship versus under the Lido—layout noise is real at this passenger count, and elevator banks get busy after shows.
For food, we treat Club Diadema and Teppanyaki as the paid splurge nights, keep Scudo Rosso and Sissi as the MDR baseline, and use La Piazza when the kids need pizza now. Versus newer Costa LNG ships, Diadema is the Dream-era flagship: familiar Carnival-family hardware wearing Costa branding and Med itineraries. Confirm your sailing below and we’ll steer cabin and dining packages to the people in your cabin.
She's for
- Families who want lively Mediterranean energy
- Spa-minded guests booking Samsara cabins
- Multi-gen groups who like Italian dining and shows
- Shoppers comparing Costa to Carnival Dream-class value
She's not for
- Quiet couples chasing adult-only calm
- Anyone who prefers English-first megaship culture
- Travellers who dislike crowded pool decks and atriums
Honest caveat
She’s Costa-built Dream-class DNA—great Italian product, but not identical to ships designed only for Costa from day one. We’ll walk Samsara versus standard balcony tradeoffs before you lock a category.
The record · ship backgroundCosta Diadema, on paper
Show ship backgroundHide ship background
The record · ship background
Costa Diadema, on paper
Show ship backgroundHide ship backgroundCosta Diadema is a Dream-class liner from Fincantieri Marghera (hull 6203)—keel laid 10 December 2012, floated 16 November 2013, delivered 25 October 2014, and christened in Venice on 7 November 2014. Her inaugural cruise left Venice the next day on a Western Mediterranean loop calling Italy, Spain, and France. Size and capacity sit on the fact sheet on this page.
Ordered in 2011 as Costa’s then-largest newbuild, she outscaled Carnival Dream sisters in space and introduced Costa’s own décor language while sharing Dream-class DNA. Fleet notes include early trials of the 4GOODFOOD waste program and onboard buffalo mozzarella production. A November 2023 Marseille drydock refreshed public rooms and staterooms with new soft goods across the ship.
Deployment is classic Costa Med: homeports such as Savona, Barcelona, Valencia, and Marseille on week-long Western Mediterranean patterns. Confirm the sailing below for the current embarkation city and itinerary before you choose cabin type. Use the sailings table on this page to verify dates rather than assuming last year’s rotation.
Build record
- Keel to delivery
- 2012 – 2014
- Inaugural
- Nov 2014, Venice
- Fuel
- Marine diesel
- Sisters
- Carnival Breeze, Carnival Dream, Carnival Magic
Commerce
Upcoming sailings
40 itineraries · 205 sail dates on Costa Diadema. Fares are live and change daily.
| Sailing | Date | Depart | Nights | $/n | Inside | Balcony | Suite |
|---|---|---|---|---|---|---|---|
| North Europe From CopenhagenCopenhagen (Denmark) | Hellesylt (Norway) | Geiranger Fjord | Geiranger (Norway) | Bergen (Norway) | Norwegian Sea | Stavanger (Norway) | Kiel (Germany) | Copenhagen (Denmark) · 3 dates | Aug 8, 2026 | Copenhagen | 7 | $381 | $2,666 | — | — |
| North Europe From KielKiel (Germany) | Copenhagen (Denmark) | Hellesylt (Norway) | Geiranger Fjord | Geiranger (Norway) | Bergen (Norway) | Norwegian Sea | Stavanger (Norway) | Kiel (Germany) · 2 dates | Aug 14, 2026 | Kiel | 7 | $315 | $2,207 | — | — |
| North Europe From KielKiel (Germany) | Copenhagen (Denmark) | Hellesylt (Norway) | Geiranger Fjord | Geiranger (Norway) | Alesund (Norway) | Stavanger (Norway) | Kiel (Germany) | Aug 28, 2026 | Kiel | 7 | $281 | $1,964 | $2,604 | $3,484 |
| 6-Night · Costa DiademaCopenhague (Dinamarca) | Hellesylt (Noruega) | Fiordo De Geiranger | Geiranger (Noruega) | Alesund (Noruega) | Stavanger (Noruega) | Kiel (Alemania) | Aug 29, 2026 | Copenhagen | 6 | $285 | $1,707 | — | — |
| North Europe From CopenhagenCopenhagen (Denmark) | Hellesylt (Norway) | Geiranger Fjord | Geiranger (Norway) | Alesund (Norway) | Stavanger (Norway) | Kiel (Germany) | Copenhagen (Denmark) | Aug 29, 2026 | Copenhagen | 7 | $296 | $2,074 | — | $3,484 |
| North Europe From KielKiel (Germany) | Copenhagen (Denmark) | Hellesylt (Norway) | Geiranger Fjord | Geiranger (Norway) | Olden (Norway) | Stavanger (Norway) | Kiel (Germany) | Sep 4, 2026 | Kiel | 7 | $281 | $1,964 | $2,604 | $2,924 |
Showing 6 of 40 itinerary groups
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