About Costa Diadema Cruises
CruiseSheet currently offers 173 cruises from Diadema starting at only $129. Diadema is a Costa ship and is known for its cruises to South America and Europe.
The Diadema Costa is the flagship of the Diadema class, based in South America and Europe, that can accomodate more than 3,700 travelers.
The Diadema Costa offers guests a roller skating rink, a casino, an outdoor movie theater, a solarium, a gym, a jacuzzi, and a spa.
Best Diadema Cruise Deals
November 2, 2026
6 Night Western Mediterranean Cruise from Savona to Lisbon
CruiseScore™ (4.04/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
Inside
October 29, 2026
4 Night Western Mediterranean from Savona Cruise
CruiseScore™ (4.02/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Marseille
→
Savona
Inside
LOWEST PRICE EVER
October 29, 2026
2 Night Mediterranean Cruise from Savona to Barcelona
CruiseScore™ (4.02/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
Inside
PRICE RISING
November 2, 2026
9 Night Western Europe Cruise from Savona to Tenerife
CruiseScore™ (3.97/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
→
Las Palmas
→
Tenerife
Inside
November 11, 2026
11 Night Transatlantic From S. Cruz de Tenerife Cruise
CruiseScore™ (4.06/5)
Costa Diadema
S
M
L
XL
Tenerife
→
Mindelo
→
Maceió
→
Salvador
→
Rio de Janeiro
Inside
Last Minute Diadema Cruise Deals
November 2, 2026
6 Night Western Mediterranean Cruise from Savona to Lisbon
CruiseScore™ (4.04/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
Inside
October 29, 2026
4 Night Western Mediterranean from Savona Cruise
CruiseScore™ (4.02/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Marseille
→
Savona
Inside
LOWEST PRICE EVER
October 29, 2026
2 Night Mediterranean Cruise from Savona to Barcelona
CruiseScore™ (4.02/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
Inside
PRICE RISING
November 2, 2026
9 Night Western Europe Cruise from Savona to Tenerife
CruiseScore™ (3.97/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
→
Las Palmas
→
Tenerife
Inside
November 11, 2026
11 Night Transatlantic From S. Cruz de Tenerife Cruise
CruiseScore™ (4.06/5)
Costa Diadema
S
M
L
XL
Tenerife
→
Mindelo
→
Maceió
→
Salvador
→
Rio de Janeiro
Inside
Deck Plans for Diadema
Explore the 9 decks with passenger accommodations on Diadema:
Monthly Diadema Pricing
Overall cruises on Diadema are fairly affordable compared to other ships. Prices are around equal throughout the year. See the graph below for the monthly average cost per day.
Jan
Feb
Mar
Apr
$163
May
$174
Jun
$196
Jul
$214
Aug
$214
Sep
$137
Oct
$144
Nov
$111
Dec
