Costa Cruises has launched a new series of seven-night itineraries across South America with the Costa Diadema, marking the start of its longer regional cruises for the season. The sailings connect Brazil, Argentina and Uruguay.
After completing a run of short cruises in Brazil, Costa Diadema has now shifted to weeklong itineraries. These cruises depart from three different homeports: Santos, Itajaí and Buenos Aires.
The first sailing of the series began on December 21, 2025, when the 3,700-guest ship arrived at the Port of Santos. From there, the vessel set off on a route that blends sea days with regional port calls.
Each itinerary includes three days of cruising in the Atlantic Ocean. A visit to Montevideo, Uruguay, is also part of the regular schedule, offering guests time ashore in the historic port city.
The current deployment will continue through late March. After that, Costa Diadema is scheduled to return to offering shorter cruises along the Brazilian coast.
As part of Costa’s 2025–26 South America season, the ship arrived in Brazil in early November. Before beginning her cruise schedule, the vessel served a different role.
Costa Diadema acted as a floating hotel in Belém, alongside MSC Seaview. The ships accommodated participants attending UNFCCC COP 30, creating a unique port operation.
Following this assignment, the ship arrived in Santos in late November. She then began a series of three- and four-night cruises to Ilhabela, also sailing from Itajaí.
Before repositioning back to Europe, Costa Diadema will offer additional short cruises in the region. These sailings give guests more flexible options during the peak summer season.
Costa’s South American program also includes Costa Favolosa, which is offering longer itineraries from Rio de Janeiro, Montevideo and Buenos Aires.
Looking ahead, Costa Cruises has also outlined plans for the 2026–27 winter season. Costa Diadema will be joined by Costa Serena for cruises ranging from three to nine nights.
The upcoming season will feature a special repositioning voyage through Patagonia and Tierra del Fuego. That sailing will form part of a world cruise offered by Costa Serena in late 2026.
