Costa
Diadema

About Costa Diadema Cruises

Diadema is a Costa ship and is known for its itineraries to Europe and South America. CruiseSheet currently offers 205 itineraries from Diadema from only $130.

Based in Europe and South America and refurbished less than three years ago in 2023, over 3,700 guests can sail on this Dream class vessel.

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

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
$400
$67 per day
Inside
LOWEST PRICE EVER
4 Night Marseille to Marseille cruise
September 22, 2026
Costa Diadema
S M L XL
Marseille → Savona → Palma Mallorca → Marseille
$385
$96 per day
Inside
LOWEST PRICE EVER
11 Night Savona to Savona cruise
September 27, 2026
Costa Diadema
S M L XL
Savona → Barcelona → Cadiz → Lisbon → Gibraltar → Malaga → Cartagena → Marseille → Savona
$1,096
$100 per day
Inside
LOWEST PRICE EVER
4 Night Marseille to Marseille cruise
October 28, 2026
Costa Diadema
S M L XL
Marseille → Savona → Barcelona → Marseille
$394
$99 per day
Inside
LOWEST PRICE EVER
9 Night Savona to Tenerife cruise
November 2, 2026
Costa Diadema
S M L XL
Savona → Barcelona → Malaga → Cadiz → Lisbon → Las Palmas → Tenerife
$806
$90 per day
Inside
Browse More Diadema Deals

Last Minute Diadema Cruise Deals

LOWEST PRICE EVER
4 Night Marseille to Marseille cruise
September 22, 2026
Costa Diadema
S M L XL
Marseille → Savona → Palma Mallorca → Marseille
$385
$96 per day
Inside
LOWEST PRICE EVER
11 Night Savona to Savona cruise
September 27, 2026
Costa Diadema
S M L XL
Savona → Barcelona → Cadiz → Lisbon → Gibraltar → Malaga → Cartagena → Marseille → Savona
$1,096
$100 per day
Inside
LOWEST PRICE EVER
4 Night Marseille to Marseille cruise
October 28, 2026
Costa Diadema
S M L XL
Marseille → Savona → Barcelona → Marseille
$394
$99 per day
Inside
LOWEST PRICE EVER
4 Night Savona to Savona cruise
October 29, 2026
Costa Diadema
S M L XL
Savona → Barcelona → Marseille → Savona
$609
$152 per day
Suite
10 Night Barcelona to Barcelona cruise
October 9, 2026
Costa Diadema
S M L XL
Barcelona → Tangier → Casablanca → Seville → Gibraltar → Malaga → Marseille → Savona → Barcelona
$1,159
$116 per day
Inside
See More Last Minute Diadema deals

Monthly Diadema Pricing

Diadema sailings during the the peak season of summer are significantly more expensive than the the low season of winter. On average Diadema is fairly inexpensive compared to other ships. Check out the graph below for the average cost per day by month.

Jan
Feb
$173
Mar
$187
Apr
$137
May
$174
Jun
$200
Jul
$214
Aug
$218
Sep
$142
Oct
$141
Nov
Dec

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