About Costa Diadema Cruises
CruiseSheet currently has 177 itineraries from Diadema from only $129. Diadema is a Costa ship and is best known for its sailings to South America and Europe.
Based in South America and Europe and refurbished only three years ago in 2023, over 3,700 people can sail comfortably on this Dream class ship.
The Diadema Costa delights guests with a roller skating rink, a casino, a jacuzzi, a gym, a solarium, a spa, and an outdoor movie theater.
Costa Diadema
Best Diadema Cruise Deals
LOWEST PRICE EVER
October 31, 2026
2 Night Mediterranean Cruise from Barcelona to Savona
CruiseScore™ (3.88/5)
Costa Diadema
S
M
L
XL
Barcelona
→
Marseille
→
Savona
Inside
November 2, 2026
6 Night Mediterranean Cruise from Savona to Lisbon
CruiseScore™ (4.01/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
Inside
LOWEST PRICE EVER
October 28, 2026
3 Night Mediterranean Cruise from Marseille to Barcelona
CruiseScore™ (4.13/5)
Costa Diadema
S
M
L
XL
Marseille
→
Savona
→
Barcelona
Inside
LOWEST PRICE EVER
October 29, 2026
2 Night Mediterranean Cruise from Savona to Barcelona
CruiseScore™ (3.81/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
Inside
October 29, 2026
4 Night Western Mediterranean from Savona Cruise
CruiseScore™ (3.88/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Marseille
→
Savona
Inside
Last Minute Diadema Cruise Deals
LOWEST PRICE EVER
October 31, 2026
2 Night Mediterranean Cruise from Barcelona to Savona
CruiseScore™ (3.88/5)
Costa Diadema
S
M
L
XL
Barcelona
→
Marseille
→
Savona
Inside
November 2, 2026
6 Night Mediterranean Cruise from Savona to Lisbon
CruiseScore™ (4.01/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Malaga
→
Cadiz
→
Lisbon
Inside
LOWEST PRICE EVER
October 28, 2026
3 Night Mediterranean Cruise from Marseille to Barcelona
CruiseScore™ (4.13/5)
Costa Diadema
S
M
L
XL
Marseille
→
Savona
→
Barcelona
Inside
LOWEST PRICE EVER
October 29, 2026
2 Night Mediterranean Cruise from Savona to Barcelona
CruiseScore™ (3.81/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
Inside
October 29, 2026
4 Night Western Mediterranean from Savona Cruise
CruiseScore™ (3.88/5)
Costa Diadema
S
M
L
XL
Savona
→
Barcelona
→
Marseille
→
Savona
Inside
Deck Plans for Diadema
Explore the 9 decks with passenger accommodations on Diadema:
Monthly Diadema Pricing
Prices are around equal throughout the year. Overall Diadema is rather inexpensive compared to other ships. See the illustration below for the average cost per day by month.
Jan
Feb
Mar
Apr
$119
May
$174
Jun
$200
Jul
$214
Aug
$214
Sep
$139
Oct
$144
Nov
Dec
