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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
  • 103cruises now
  • $109fares from

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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 2012. 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 103 cruises on sale, with lead fares from $109 to $2,840. 6 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
2012
Launched
2014
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 Emerald Theater is the main entertainment venue on Costa Diadema.
  • The Andularia Restaurant stretches along the whole of Costa Diadema's deck 3.
    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 cruisers' dining options run from the elegant to the casual.
  • Costa Diadema hosts 15 bars and lounges.
    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.
    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

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  1. 2 Night Barcelona to Savona 2 nights · from Barcelona Next Sep 21, 2026 2 dates from $366
  2. 4 Night Barcelona to Palma 4 nights · from Barcelona Next Sep 21, 2026 from $730
  3. 7 Night Barcelona to Barcelona 7 nights · from Barcelona Next Sep 21, 2026 from $1,310
  4. 4 Night Marseille to Marseille 4 nights · from Marseille Next Sep 22, 2026 from $543
  5. 2 Night Savona to Palma 2 nights · from Savona Next Sep 23, 2026 from $292
  6. 4 Night Savona to Savona 4 nights · from Savona Next Sep 23, 2026 from $618
  7. 11 Night Marseille to Marseille 11 nights · from Marseille Next Sep 26, 2026 2 dates from $2,000
  8. 2 Night Marseille to Barcelona 2 nights · from Marseille Next Sep 26, 2026 Fare on request
  9. 11 Night Savona to Savona 11 nights · from Savona Next Sep 27, 2026 2 dates from $1,855
  10. 13 Night Cadiz to Cadiz 13 nights · from Cadiz Next Sep 30, 2026 from $2,101
  11. 10 Night Marseille to Marseille 10 nights · from Marseille Next Oct 7, 2026 from $1,970
  12. 10 Night Savona to Savona 10 nights · from Savona Next Oct 8, 2026 from $1,845
Show 48 more
  1. 10 Night Barcelona to Barcelona 10 nights · from Barcelona Next Oct 9, 2026 from $1,457
  2. 8 Night Cadiz to Cadiz 8 nights · from Cadiz Next Oct 13, 2026 from $1,425
  3. 12 Night Barcelona to Barcelona 12 nights · from Barcelona Next Oct 19, 2026 from $2,137
  4. 10 Night Cadiz to Barcelona 10 nights · from Cadiz Next Oct 21, 2026 from $1,563
  5. 3 Night Marseille to Barcelona 3 nights · from Marseille Next Oct 28, 2026 from $366
  6. 4 Night Marseille to Marseille 4 nights · from Marseille Next Oct 28, 2026 from $583
  7. 2 Night Savona to Barcelona 2 nights · from Savona Next Oct 29, 2026 from $471
  8. 4 Night Savona to Savona 4 nights · from Savona Next Oct 29, 2026 from $458
  9. 21 Night Marseille to Rio de Janeiro 21 nights · from Marseille Next Nov 1, 2026 from $2,209
  10. 22 Night Marseille to Santos 22 nights · from Marseille Next Nov 1, 2026 from $2,464
  11. 24 Night Marseille to Itajai 24 nights · from Marseille Next Nov 1, 2026 from $2,556
  12. 20 Night Savona to Rio de Janeiro 20 nights · from Savona Next Nov 2, 2026 from $1,776
  13. 21 Night Savona to Santos 21 nights · from Savona Next Nov 2, 2026 from $2,309
  14. 23 Night Savona to Itajai 23 nights · from Savona Next Nov 2, 2026 from $2,491
  15. 6 Night Savona to Lisbon 6 nights · from Savona Next Nov 2, 2026 from $619
  16. 8 Night Savona to Las Palmas 8 nights · from Savona Next Nov 2, 2026 from $961
  17. 16 Night Barcelona to Maceio 16 nights · from Barcelona Next Nov 3, 2026 from $1,917
  18. 17 Night Barcelona to Salvador 17 nights · from Barcelona Next Nov 3, 2026 from $1,910
  19. 19 Night Barcelona to Rio de Janeiro 19 nights · from Barcelona Next Nov 3, 2026 from $2,073
  20. 20 Night Barcelona to Santos 20 nights · from Barcelona Next Nov 3, 2026 from $2,237
  21. 22 Night Barcelona to Itajai 22 nights · from Barcelona Next Nov 3, 2026 from $2,419
  22. 14 Night Lisbon to Rio de Janeiro 14 nights · from Lisbon Next Nov 8, 2026 from $1,735
  23. 15 Night Lisbon to Santos 15 nights · from Lisbon Next Nov 8, 2026 from $1,910
  24. 12 Night Las Palmas to Rio de Janeiro 12 nights · from Las Palmas Next Nov 10, 2026 from $1,310
  25. 13 Night Las Palmas to Santos 13 nights · from Las Palmas Next Nov 10, 2026 from $1,605
  26. 11 Night Santa Cruz to Rio de Janeiro 11 nights · from Santa Cruz De Tenerife Next Nov 11, 2026 from $1,183
  27. 12 Night Santa Cruz to Santos 12 nights · from Santa Cruz De Tenerife Next Nov 11, 2026 from $1,407
  28. 4 Night Maceio to Santos 4 nights · from Maceio Next Nov 19, 2026 from $793
  29. 3 Night Salvador to Santos 3 nights · from Salvador de Bahia Next Nov 20, 2026 from $631
  30. 2 Night Santos to Itajai 2 nights · from Santos Next Nov 23, 2026 Fare on request
  31. 3 Night Santos to Santos 3 nights · from Santos Next Nov 23, 2026 5 dates Fare on request
  32. 3 Night Itajai to Itajai 3 nights · from Itajai Next Nov 25, 2026 4 dates Fare on request
  33. 4 Night Itajai to Itajai 4 nights · from Itajai Next Nov 28, 2026 5 dates Fare on request
  34. 4 Night Santos to Santos 4 nights · from Santos Next Nov 29, 2026 5 dates Fare on request
  35. 7 Night Itajai to Itajai 7 nights · from Itajai Next Dec 19, 2026 13 dates Fare on request
  36. 7 Night Santos to Santos 7 nights · from Santos Next Dec 20, 2026 13 dates Fare on request
  37. 7 Night Buenos Aires to Buenos Aires 7 nights · from Buenos Aires Next Dec 23, 2026 12 dates Fare on request
  38. 7 Night Montevideo to Montevideo 7 nights · from Montevideo Next Dec 24, 2026 11 dates Fare on request
  39. 4 Night Buenos Aires to Santos 4 nights · from Buenos Aires Next Mar 17, 2027 Fare on request
  40. 3 Night Montevideo to Santos 3 nights · from Montevideo Next Mar 18, 2027 Fare on request
  41. 3 Night Itajai to Itajai 3 nights · from Itajai Next Mar 24, 2027 2 dates Fare on request
  42. 3 Night Santos to Santos 3 nights · from Santos Next Mar 25, 2027 2 dates Fare on request
  43. 22 Night Santos to Dover 22 nights · from Santos Next Apr 4, 2027 from $2,493
  44. 26 Night Santos to Kiel 26 nights · from Santos Next Apr 4, 2027 from $2,524
  45. 27 Night Santos to Copenhagen 27 nights · from Santos Next Apr 4, 2027 from $2,840
  46. 4 Night Santos to Salvador 4 nights · from Santos Next Apr 4, 2027 Fare on request
  47. 25 Night Rio de Janeiro to Kiel 25 nights · from Rio De Janeiro Next Apr 5, 2027 from $2,369
  48. 22 Night Salvador to Kiel 22 nights · from Salvador de Bahia Next Apr 8, 2027 from $2,257

Showing the 60 soonest of 103 cruises.

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