Costa
Diadema

About Costa Diadema Cruises

Diadema is a Costa ship and is best known for its sailings to Europe and South America. CruiseSheet currently offers 198 itineraries from Diadema starting at just $450.

Based in Europe and South America and refurbished just three years ago in 2023, over 3,700 people can cruise on this Dream class vessel.

The Diadema Costa delights guests with a roller skating rink, a jacuzzi, an outdoor movie theater, a casino, a spa, a gym, and a solarium.

Costa Diadema

Best Diadema Cruise Deals

6 Night Savona to Lisbon cruise
November 2, 2026
Costa Diadema
S M L XL
Savona → Barcelona → Malaga → Cadiz → Lisbon
$450
$75 per day
Inside
20 Night Savona to Rio cruise
November 2, 2026
Costa Diadema
S M L XL
Savona → Barcelona → Malaga → Cadiz → Lisbon → Las Palmas → Tenerife → Mindelo → Maceió → Salvador → Rio
$1,776
$89 per day
Inside
25 Night Rio to Kiel cruise
April 5, 2027
Costa Diadema
S M L XL
Rio → Salvador → Maceió → Praia → Las Palmas → Casablanca → Malaga → Oporto → Vigo → Paris → London → Aarhus → Kiel
$2,452
$98 per day
Inside
21 Night Marseille to Rio cruise
November 1, 2026
Costa Diadema
S M L XL
Marseille → Savona → Barcelona → Malaga → Cadiz → Lisbon → Las Palmas → Tenerife → Mindelo → Maceió → Salvador → Rio
$2,081
$99 per day
Inside
24 Night Marseille to Itajai cruise
November 1, 2026
Costa Diadema
S M L XL
Marseille → Savona → Barcelona → Malaga → Cadiz → Lisbon → Las Palmas → Tenerife → Mindelo → Maceió → Salvador → Rio → Sao Paolo → Itajai
$2,411
$100 per day
Inside
Browse More Diadema Deals

Last Minute Diadema Cruise Deals

7 Night Kiel to Kiel cruise
August 28, 2026
Costa Diadema
S M L XL
Kiel → Copenhagen → Hellesylt → Ålesund → Stavanger → Kiel
$1,515
$216 per day
Inside
7 Night Copenhagen to Copenhagen cruise
July 11, 2026
Costa Diadema
S M L XL
Copenhagen → Geiranger → Hellesylt → Bergen → Stavanger → Kiel → Copenhagen
$1,697
$242 per day
Inside
7 Night Copenhagen to Copenhagen cruise
June 27, 2026
Costa Diadema
S M L XL
Copenhagen → Geiranger → Hellesylt → Ålesund → Stavanger → Kiel → Copenhagen
$1,755
$251 per day
Inside
7 Night Copenhagen to Copenhagen cruise
August 29, 2026
Costa Diadema
S M L XL
Copenhagen → Hellesylt → Ålesund → Stavanger → Kiel → Copenhagen
$1,785
$255 per day
Inside
7 Night Kiel to Kiel cruise
June 26, 2026
Costa Diadema
S M L XL
Kiel → Copenhagen → Hellesylt → Ålesund → Stavanger → Kiel
$1,865
$266 per day
Inside
See More Last Minute Diadema deals

Monthly Diadema Pricing

Overall Diadema is moderately expensive compared to other ships. Check the diagram below for the monthly average cost per day. Diadema sailings during the the peak season of summer are significantly more expensive than the the low season of fall.

Jan
$195
Feb
$171
Mar
$185
Apr
$136
May
$180
Jun
$212
Jul
$246
Aug
$255
Sep
$161
Oct
$159
Nov
Dec
$224

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