Costa
Diadema

About Costa Diadema Cruises

Diadema is a Costa ship and is well known for its itineraries to Europe and South America. CruiseSheet currently lists 201 sailings from Diadema beginning at just $130.

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

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

Costa Diadema

Best Diadema Cruise Deals

LOWEST PRICE EVER
6 Night Savona to Lisbon cruise
November 2, 2026
Costa Diadema
S M L XL
Savona → Barcelona → Malaga → Cadiz → Lisbon
$380
$63 per day
Inside
4 Night Marseille to Marseille cruise
September 22, 2026
Costa Diadema
S M L XL
Marseille → Savona → Palma de Mallorca → Marseille
$375
$94 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, Spain → Marseille → Savona
$1,096
$100 per day
Inside
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
Browse More Diadema Deals

Last Minute Diadema Cruise Deals

4 Night Marseille to Marseille cruise
September 22, 2026
Costa Diadema
S M L XL
Marseille → Savona → Palma de Mallorca → Marseille
$375
$94 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, Spain → Marseille → Savona
$1,096
$100 per day
Inside
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

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

Jan
Feb
$175
Mar
$186
Apr
$129
May
$173
Jun
$200
Jul
$214
Aug
$218
Sep
$142
Oct
$141
Nov
Dec

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