Cruiseable Plan my cruise

Costa Cruises

Costa Diadema

Mega ship Bliss scored

The newest addition to the Costa Cruises fleet in October 2014, the flagship Costa Diadema (Italian for \"tiara\") includes exclusive innovations in the areas of food, entertainment and technology. Costa Diadema offers several innovative experiences, while…

  • 4,947guests
  • 132,500gross tons
  • 73cruises now
  • $490fares from

Check price See cruises Get price alerts

The Emerald Theater is the main entertainment venue on Costa Diadema.

At a glance

Costa Diadema is a mega-size cruise ship operated by Costa Cruises, in service since 2014. It carries 4,947 guests and 1,253 crew (3.9 guests per crew member) at 132,500 gross tons. It is the 3rd largest of 9 Costa Cruises ships by guest capacity. On Cruiseable's Bliss scale it scores highest for entertainment and family friendly (8/10) and lowest for active, adventure & nature, cultural, romantic, spa & fitness and staterooms (6/10). It is rated 4 out of 5 by Cruiseable. It has 73 cruises on sale, with lead fares from $490 to $2,849. 1 of its upcoming sailings dropped in price since the previous weekly fare check.

Builder's plate

Specs

Cruiseable
4 / 5
  • Berlitz
  • Cruise Critic
Guests
4,947
Crew
1,253
Gross tons
132,500
Decks
20
Length
1,004 ft
Beam
122 ft
Maiden voyage
2014
Launched
2013
Space ratio
3.9
Gross tons per guest
Guests per crew
3.9
IMO
9636888

Bliss scores

What Costa Diadema is best at

Ten dimensions scored by our editors on a 10-point scale. The Cruiseable app ranks every cruise against the mix you care about.

  1. Active 6.0
  2. Adventure and nature 6.0
  3. Cultural 6.0
  4. Dining 7.0
  5. Entertainment 8.0
  6. Family friendly 8.0
  7. Party 7.0
  8. Romantic 6.0
  9. Spa and fitness 6.0
  10. Staterooms 6.0

About the ship

The newest addition to the Costa Cruises fleet in October 2014, the flagship Costa Diadema (Italian for \"tiara\") includes exclusive innovations in the areas of food, entertainment and technology. Costa Diadema offers several innovative experiences, while surrounding passengers with a refined atmosphere. The ship features everything from an endless selection of food, with a variety of global flavors for you to enjoy, to the most spectacular Samsara Spa in the entire fleet, to enhance passengers' well-being.

Photos

Inside and out

More photos 5

  • The Emerald Theater is the main entertainment venue on Costa Diadema.
  • The Andularia Restaurant stretches along the whole of Costa Diadema's deck 3.
  • Costa Diadema cruisers' dining options run from the elegant to the casual.
  • Costa Diadema hosts 15 bars and lounges.
  • Take in the beautiful view from one of the four glass elevators that service Costa Diadema's multi-deck atrium.

Sailing now

Cruises on Costa Diadema

Check price
  1. 16 Night Barcelona to Maceio 16 nights · from Barcelona Next Nov 3, 2026 from $1,919
  2. 17 Night Barcelona to Salvador 17 nights · from Barcelona Next Nov 3, 2026 from $1,912
  3. 19 Night Barcelona to Rio de Janeiro 19 nights · from Barcelona Next Nov 3, 2026 from $2,073
  4. 20 Night Barcelona to Santos 20 nights · from Barcelona Next Nov 3, 2026 from $2,235
  5. 22 Night Barcelona to Itajai 22 nights · from Barcelona Next Nov 3, 2026 from $2,407
  6. 14 Night Lisbon to Rio de Janeiro 14 nights · from Lisbon Next Nov 8, 2026 from $1,734
  7. 15 Night Lisbon to Santos 15 nights · from Lisbon Next Nov 8, 2026 from $1,906
  8. 12 Night Las Palmas to Rio de Janeiro 12 nights · from Las Palmas Next Nov 10, 2026 from $1,309
  9. 13 Night Las Palmas to Santos 13 nights · from Las Palmas Next Nov 10, 2026 from $1,601
  10. 11 Night Santa Cruz to Rio de Janeiro 11 nights · from Santa Cruz De Tenerife Next Nov 11, 2026 from $1,180
  11. 12 Night Santa Cruz to Santos 12 nights · from Santa Cruz De Tenerife Next Nov 11, 2026 from $1,401
  12. 4 Night Maceio to Santos 4 nights · from Maceio Next Nov 19, 2026 from $787
Show 48 more
  1. 3 Night Rio de Janeiro to Itajai 3 nights · from Rio De Janeiro Next Nov 22, 2026 Fare on request
  2. 2 Night Santos to Itajai 2 nights · from Santos Next Nov 23, 2026 Fare on request
  3. 3 Night Santos to Santos 3 nights · from Santos Next Nov 23, 2026 5 dates Fare on request
  4. 3 Night Itajai to Itajai 3 nights · from Itajai Next Nov 25, 2026 4 dates Fare on request
  5. 4 Night Itajai to Itajai 4 nights · from Itajai Next Nov 28, 2026 Fare on request
  6. 4 Night Santos to Santos 4 nights · from Santos Next Nov 29, 2026 Fare on request
  7. 4 Night Itajai to Itajai 4 nights · from Itajai Next Dec 5, 2026 4 dates Fare on request
  8. 4 Night Santos to Santos 4 nights · from Santos Next Dec 6, 2026 4 dates Fare on request
  9. 7 Night Itajai to Itajai 7 nights · from Itajai Next Dec 19, 2026 13 dates Fare on request
  10. 7 Night Santos to Santos 7 nights · from Santos Next Dec 20, 2026 13 dates from $1,721
  11. 7 Night Buenos Aires to Buenos Aires 7 nights · from Buenos Aires Next Dec 23, 2026 12 dates Fare on request
  12. 7 Night Montevideo to Montevideo 7 nights · from Montevideo Next Dec 24, 2026 9 dates Fare on request
  13. 4 Night Buenos Aires to Santos 4 nights · from Buenos Aires Next Mar 17, 2027 Fare on request
  14. 3 Night Montevideo to Santos 3 nights · from Montevideo Next Mar 18, 2027 Fare on request
  15. 3 Night Itajai to Itajai 3 nights · from Itajai Next Mar 24, 2027 2 dates Fare on request
  16. 3 Night Santos to Santos 3 nights · from Santos Next Mar 25, 2027 2 dates Fare on request
  17. 22 Night Santos to Dover 22 nights · from Santos Next Apr 4, 2027 from $2,502
  18. 26 Night Santos to Kiel 26 nights · from Santos Next Apr 4, 2027 from $2,533
  19. 27 Night Santos to Copenhagen 27 nights · from Santos Next Apr 4, 2027 from $2,849
  20. 4 Night Santos to Salvador 4 nights · from Santos Next Apr 4, 2027 Fare on request
  21. 25 Night Rio de Janeiro to Kiel 25 nights · from Rio De Janeiro Next Apr 5, 2027 from $2,382
  22. 22 Night Salvador to Kiel 22 nights · from Salvador de Bahia Next Apr 8, 2027 from $2,270
  23. 14 Night Salvador to Leixoes 14 nights · from Salvador de Bahia Next Apr 8, 2027 from $1,615
  24. 7 Night Kiel to Kiel 7 nights · from Kiel Next Apr 30, 2027 from $1,240
  25. 7 Night Copenhagen to Copenhagen 7 nights · from Copenhagen Next May 1, 2027 from $1,270
  26. 14 Night Kiel to Kiel 14 nights · from Kiel Next May 7, 2027 Fare on request
  27. 7 Night Kiel to Kiel 7 nights · from Kiel Next May 21, 2027 from $1,325
  28. 7 Night Copenhagen to Copenhagen 7 nights · from Copenhagen Next May 22, 2027 from $1,355
  29. 7 Night Kiel to Kiel 7 nights · from Kiel Next May 28, 2027 from $1,352
  30. 7 Night Copenhagen to Copenhagen 7 nights · from Copenhagen Next May 29, 2027 from $1,382
  31. 7 Night Kiel to Kiel 7 nights · from Kiel Next Jun 4, 2027 10 dates from $1,387
  32. 7 Night Copenhagen to Copenhagen 7 nights · from Copenhagen Next Jun 5, 2027 3 dates from $1,436
  33. 7 Night Kiel to Kiel 7 nights · from Kiel Next Jun 25, 2027 from $1,473
  34. 7 Night Kiel to Kiel 7 nights · from Kiel Next Jul 9, 2027 2 dates from $1,473
  35. 7 Night Kiel to Kiel 7 nights · from Kiel Next Jul 30, 2027 from $1,590
  36. 10 Night Kiel to Barcelona 10 nights · from Kiel Next Sep 10, 2027 from $1,382
  37. 11 Night Kiel to Marseille 11 nights · from Kiel Next Sep 10, 2027 from $1,479
  38. 12 Night Kiel to Savona 12 nights · from Kiel Next Sep 10, 2027 from $1,549
  39. 10 Night Copenhagen to Marseille 10 nights · from Copenhagen Next Sep 11, 2027 from $1,413
  40. 11 Night Copenhagen to Savona 11 nights · from Copenhagen Next Sep 11, 2027 from $1,493
  41. 9 Night Copenhagen to Barcelona 9 nights · from Copenhagen Next Sep 11, 2027 from $1,265
  42. 3 Night Barcelona to Barcelona 3 nights · from Barcelona Next Sep 20, 2027 from $490
  43. 10 Night Marseille to Marseille 10 nights · from Marseille Next Sep 21, 2027 from $1,675
  44. 10 Night Savona to Savona 10 nights · from Savona Next Sep 22, 2027 from $1,670
  45. 10 Night Barcelona to Barcelona 10 nights · from Barcelona Next Sep 23, 2027 from $1,661
  46. 10 Night Marseille to Marseille 10 nights · from Marseille Next Oct 1, 2027 from $1,665
  47. 10 Night Savona to Savona 10 nights · from Savona Next Oct 2, 2027 from $1,659
  48. 10 Night Barcelona to Barcelona 10 nights · from Barcelona Next Oct 3, 2027 from $1,650

Showing the 60 soonest of 73 cruises.

Side by side

Compare Costa Diadema with

Thinking about Costa Diadema?

Tell us your dates and who is coming. Our partner travel agency replies with the sailings and cabins that fit.

Plan my cruise More Costa Cruises ships