Families who want a big, lively Italian-style resort ship at a lower price.
Think twice if: Guests come from many countries, so expect multilingual announcements and a European crowd; check Costa's site for which restaurants cost extra.
See her Europe sailings ↓ · Where is she now? → · Costa Cruises's page for this ship →
What she's like
A floating resort with the most to do. Expect lines at boarding, the buffet and tender boats. About 36 tons of ship per guest. As a rule of thumb, 40 or more feels roomy and under 30 feels busy.
Unknown from line's site.
Our judgment, from $ (budget) to $$$$$ (ultra-luxury).
Not published. Assume drinks, tips and wifi cost extra.
The line doesn't say.
The line doesn't say.
Her Europe sailings, November 2026 to November 2027
69 sailings in Europe on the published schedule, 3 to 14 nights. Tap a start port to see how to get from the airport to the ship.
Where they start
- Kiel , 24 sailings how to get there →
- Copenhagen , 22 sailings how to get there →
- Savona , 8 sailings how to get there →
- Barcelona , 7 sailings how to get there →
- Marseille , 5 sailings how to get there →
- Alicante , 3 sailings
What it costs beyond the fare
| Tips for the crew | EUR 11 (age 15+); EUR 5.50 (ages 4-14); under 4 free per person per day; Added to your bill automatically; SECONDARY source (CruiseDirect); Costa's own FAQ pages load by script and returned no text. Rates may change for sailings from Dec 1, 2026. |
|---|---|
| Money on board | EUR on Europe cruises (per secondary source's service-charge currency). |
How tipping and money work on a European cruise → · Build a full trip budget →
Her restaurants
The line's site doesn't list this ship's restaurants by name.
Which cabin to book, and which to avoid
The line doesn't publish cabin sizes for this ship that we could find.
Good to know before you pick
- Deck 9 cabins (aft, fwd, mid) sit below Deck 10 venues in the same zone: Lido Diana Pool (mid); Bar Lido Diana (mid); The Salty Beach Street Food (mid); Restaurant Buffet (aft); Corona Blu Restaurant (aft); Lido Stella del Sud (aft)
- Deck 2 cabins (aft, fwd, mid) sit below Deck 3 venues in the same zone: Theatre (fwd); Adularia Restaurant (mid); Fiorentino Restaurant (aft)
If you use a wheelchair or walk with difficulty
Elevators: Elevator groups named Prua (forward), Center and Poppa (aft) in the SVGs; most decks have all three Our accessibility guide →
Find your way around
Our own deck plans, drawn from the line's official plan: tap a deck to see it from above, with what's at the front, middle and back of the ship. Use “Find on board” to light up every deck with a pool, a bar or a restaurant. Not to scale.
- Deck 15 , Smoking Area; Lido Burmese Rose; Solarium
- Deck 14 , Winter Garden; Area Beauty Spa Solemio; Area Gym; Outdoor Squok Area; Outdoor Jogging Track; Sport Area; Solarium
- Deck 12 , Beauty Salon; Area Beauty Spa Solemio; Arcade Games Room; Solarium; Outdoor Squok Area; Card Room; Disco
- Deck 11 , Balcony Diana; Smoking Area; Squok Club; Squok Baby Area; Solarium; Disco; Perla Nera Library; Aperol Spritz Bar
- Deck 10 , Lido Diana Pool; Bar Lido Diana; The Salty Beach Street Food; Restaurant Buffet; Corona Blu Restaurant; Lido Stella del Sud
- Deck 9 , Cabins
- Deck 8 , Cabins
- Deck 7 , Cabins
- Deck 6 , Cabins
- Deck 5 , Theatre; Gelateria Amarillo; Smoking Area; Carlsberg Country Rock Club; Arcade Games Room; Solarium; Sushino at Costa; La Fiorentina Steak House; Teppanyaki Restaurant; Élite Suite&Club Restaurant; La Piazza Bar; Pummid'Oro Pizzeria; Casino; Casino Bar; DiVino Gran Duca di Toscana; Smoking Area; Piano Bar; Teodora Lounge; Sunset Bar
- Deck 4 , Theatre; My Moments Photo Store; C|Club Point; My Photo Shades; C-Dream; My Tours; Eliodoro Atrium; Orlov Grand Bar; Galleria Shops; Desirée Conference Room; Tiara Meeting Room; Miss Bikini; Fiorentino Restaurant
- Deck 3 , Theatre; International Hostess Info Point; Reception; Internet & App Info Point; Costa Ambassador Point; Eliodoro Atrium; Adularia Restaurant; Fiorentino Restaurant
- Deck 2 , Cabins
- Deck 1 , Cabins
- Deck 0 , Hospital
What to book, and when
The line doesn't publish its booking windows where we could find them.
The ship in numbers
- Cruise line
- Costa Cruises
- Kind of ship
- Mass-market
- Built
- 2014
- Guests
- 3,724
- Crew
- 1,253
- Gross tons
- 133,019
- Length
- 306 m (1,004 ft)
- Width
- 37 m (122 ft)
- Flag
- Italy
- Class
- Dream class
- Ship number
- IMO 9636888
- In Europe 2026–27
- Western Mediterranean, Northern Europe & Baltic, Norwegian Fjords, Canary Islands & Madeira, Atlantic Coast (Spain, Portugal, France)
Highlights
- About 3,724 guests at double occupancy (Wikipedia)
- Italian line: announcements are made in several languages and the onboard style is Italian
- Mediterranean home ports make it easy to board in Italy, Spain or France
More pictures
Sources & what we could not confirm · 7 sources · checked 2026-11
- Costa: Costa Diadema ship page (includes interactive deck plan)
- Wikipedia: Costa Diadema (secondary)
- VesselFinder: Costa Diadema (IMO 9636888)
- CruiseDirect: Costa gratuities (secondary)
- Costa Cruises FAQ (no readable text)
- Costa: drinks packages page (no readable text)
- CruiseTimetables.com: Costa Diadema schedule (independent listing)
- Costa's ship page loads its facts, dining and deck plan by script; none could be read, so all numbers are from Wikipedia (secondary)
- cabin count and refurbishment year not found
- guest_decks from Wikipedia where given
- highlights 2 and 3 are general line facts, not from the ship page
- Costa Cruises: Everything except service charge (Costa's site returns script-only pages)
- Costa Cruises: Service charge from secondary source only
- Deck plan: Cabin category codes (e.g. BP, IP, EP, MS, S) are shown as on the plan; their full names and sizes were not on the deck plan files
- Deck plan: Some labels (single letters, Exit, Credit Card Registration) left out as non-venues
- Deck plan: Deck 13 does not exist on the plan list