Costa Diadema is the elegant Italian-style flagship of Costa's pre-Smeralda era, carrying up to 4,947 guests across the Mediterranean in summer and the Persian Gulf from Dubai in winter. Highlights include a 500-metre outdoor promenade and a sprawling four-deck Samsara spa.
Ship Details
Ship Amenities
Pools & Sun Decks
Three swimming pools — one with a retractable roof — plus eight hot tubs and a multi-sport pitch
Restaurants & Bars
Seven restaurants and 15 bars, from authentic Italian classics to teppanyaki and pizza by the slice
Samsara Spa
A 7,800 m² wellness area across four decks with thalassotherapy, sauna, steam room and gym
Entertainment
Three-deck theatre, 4D cinema, casino and live Italian-style shows every evening
Family & Kids
Squok kids' club and dedicated programs for children and teens across age groups
Deck Plans
Available cruises
Costa Diadema6 days Transoceanic
Savona, Italy - Lisbon (Cascais), Portugal
2 Nov 2026 - 8 Nov 2026
Costa Diadema8 days Transoceanic
Savona, Italy - Las Palmas de Gran Canaria (Canary Islands), Spain
2 Nov 2026 - 10 Nov 2026
Costa Diadema12 days Transoceanic
Santa Cruz de Tenerife (Canary Islands), Spain - Santos (Sao Paolo), Brazil
11 Nov 2026 - 23 Nov 2026
Costa Diadema11 days Transoceanic
Santa Cruz de Tenerife (Canary Islands), Spain - Rio de Janeiro, Brazil
11 Nov 2026 - 22 Nov 2026
Costa Diadema2 days Mediterranean
Marseille (Provence), France - Barcelona, Spain
1 Nov 2026 - 3 Nov 2026
Costa Diadema3 days Mediterranean
Marseille (Provence), France - Barcelona, Spain
28 Oct 2026 - 31 Oct 2026
Frequently Asked Questions
Costa Diadema is ideal for guests who want classic Italian cruising at its finest — elegant interiors, gourmet Italian cuisine and warm Mediterranean hospitality. With a vast spa, plenty of dining choices and dedicated kids' programs, it suits couples, families and solo travelers alike.
The ship offers three swimming pools (one with a retractable roof), the four-deck Samsara spa, a 500-metre outdoor promenade, a 4D cinema, a multi-sport pitch and 15 bars. Italian gastronomy is everywhere — from artisan gelato and espresso to seven restaurants including teppanyaki and a steakhouse.