Costa Diadema leaving Kiel, 2022

Cruise Frog guide

Costa Diadema

Costa Diadema is a Costa Cruises cruise ship of the Dream class, in service since 2014. She measures 132,500 gross tons and carries 3,724 guests with a crew of 1,253. She sails South America, Northern Europe, Norwegian Fjords, Mediterranean itineraries.

Not yet rated Add to your passportSouth AmericaNorthern EuropeNorwegian FjordsMediterranean

About Costa Diadema

Costa Diadema is a modified Dream-class ship of 132,500 tons and about 3,700 guests at double occupancy, delivered by Fincantieri in October 2014. When new it was the largest ship flying the Italian flag, and it was Costa's flagship until Costa Toscana took over in 2022. Its Solemio spa covers about 7,800 square meters, and a 2024 refit added a Heineken cafe, a steakhouse, the Archipelago and Sushino restaurants and a Sunset bar. In winter 2026-27 it sails South American cruises from Santos, Itajai, Buenos Aires and Montevideo, and in summer 2027 it moves to Northern Europe for Norway and Baltic cruises from Kiel and Copenhagen.

Ratings

How she ranks
Cabins
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Dining
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Entertainment
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Service
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Pools & decks
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Value
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Editorial scores, 1 to 5 per metric; the overall is their average, not an average of reader reviews.

Deck plans

Open on the line's site

Where she sails

Home port: Santos, Brazil.

Flying in for your cruise?

Costa Diadema sails from Santos, Brazil. The airport is São Paulo/Guarulhos International (GRU), with 21 lounges to wait in before you board.

All 21 lounges at São Paulo/Guarulhos International on Lounge FrogEvery ship sailing from Santos, Brazil

Quick answers

Which cruise line operates Costa Diadema?

Costa Diadema is operated by Costa Cruises and belongs to its Dream class.

How big is Costa Diadema?

Costa Diadema measures 132,500 gross tons and 306 metres in length, with 19 decks.

How crowded does Costa Diadema feel?

Costa Diadema has a passenger space ratio of 35.6: 132,500 gross tons for 3,724 guests. Ratios over 50 feel spacious and under 30 busy, so Costa Diadema feels comfortable for her size.

How many passengers does Costa Diadema carry?

Costa Diadema carries 3,724 guests at double occupancy, with a crew of 1,253 (about 3.0 guests per crew member).

When did Costa Diadema enter service?

Costa Diadema entered service in 2014 and was last refurbished in 2024.

Where does Costa Diadema sail?

Costa Diadema sails South America, Northern Europe, Norwegian Fjords and Mediterranean itineraries. Her home port is Santos, Brazil.

Which airport should I fly into for Costa Diadema?

Costa Diadema sails from Santos, Brazil. Fly into São Paulo/Guarulhos International (GRU), which has 21 airport lounges listed on Lounge Frog.

Where can I find the deck plans for Costa Diadema?

Costa Cruises publishes the deck plans for Costa Diadema; this page links to Deck plans (interactive, on ship page).

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