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Holland AmericaAbout Costa Diadema Cruises
Diadema is a Costa ship and is known for its sailings to Europe and South America. CruiseSheet currently has 186 voyages from Diadema starting at only $124.
Based in Europe and South America and refurbished less than three years ago in 2023, over 3,700 cruisers can cruise on this Dream class vessel.
The Diadema Costa boasts a roller skating rink, a solarium, a gym, an outdoor movie theater, a jacuzzi, a casino, and a spa.
Costa Diadema
Best Diadema Cruise Deals
October 29, 2026
4 Night Western Mediterranean from Savona Cruise
CruiseScore™ (3.87/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Marseille
→
Savona
Inside
Inside
November 2, 2026
6 Night European Cruise from Savona to Lisbon
CruiseScore™ (4.02/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
Inside
Inside
LOWEST PRICE EVER
October 28, 2026
3 Night European Cruise from Marseille to Barcelona
CruiseScore™ (4.12/5)
Costa Diadema
S
M
L
XL
Marseille
→
Savona
→
Barcelona
Inside
Inside
LOWEST PRICE EVER
September 23, 2026
2 Night Mediterranean Cruise from Savona to Palma de Mallorca
CruiseScore™ (3.89/5)
Costa Diadema
S
M
L
XL
Savona
→
Palma de Mallorca
Inside
Inside
September 22, 2026
4 Night Western Mediterranean from Marseille Cruise
CruiseScore™ (4.03/5)
Costa Diadema
S
M
L
XL
Marseille
→
Savona
→
Palma de Mallorca
→
Marseille
Inside
Inside
Last Minute Diadema Cruise Deals
October 29, 2026
4 Night Western Mediterranean from Savona Cruise
CruiseScore™ (3.87/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Marseille
→
Savona
Inside
Inside
November 2, 2026
6 Night European Cruise from Savona to Lisbon
CruiseScore™ (4.02/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
Inside
Inside
LOWEST PRICE EVER
October 28, 2026
3 Night European Cruise from Marseille to Barcelona
CruiseScore™ (4.12/5)
Costa Diadema
S
M
L
XL
Marseille
→
Savona
→
Barcelona
Inside
Inside
LOWEST PRICE EVER
September 23, 2026
2 Night Mediterranean Cruise from Savona to Palma de Mallorca
CruiseScore™ (3.89/5)
Costa Diadema
S
M
L
XL
Savona
→
Palma de Mallorca
Inside
Inside
September 22, 2026
4 Night Western Mediterranean from Marseille Cruise
CruiseScore™ (4.03/5)
Costa Diadema
S
M
L
XL
Marseille
→
Savona
→
Palma de Mallorca
→
Marseille
Inside
Inside
Monthly Diadema Pricing
Prices are around steady throughout the year. On average Diadema is fairly inexpensive compared to other ships. Check the chart below for the average cost per day by month.
Jan
Feb
Mar
$204
Apr
$126
May
$174
Jun
$196
Jul
$211
Aug
$218
Sep
$139
Oct
$145
Nov
Dec
