Another Icon-of-the-Seas-Style Megaship? Make That 3 More.

The Icon of the Seas, the world’s largest cruise ship, drew as much criticism as excitement when Royal Caribbean launched it earlier this year, but the ship has been a hit among cruise goers. Now the cruise line is adding to its fleet of megaships.

The company already has two Icon Class ships on order — Star of the Seas, which will be launched in 2025, and a third ship that has not yet been named but will be delivered in 2026. It now has plans to order a fourth ship, set for a 2027 launch, with options for a fifth and sixth. The new ships build on the market response to Icon of the Seas, said Jason Liberty, president and chief executive of Royal Caribbean Group, announcing the agreement to build the new ships.

“Since its debut, Icon has exceeded our expectations in both guest satisfaction and financial performance,” Mr. Liberty said in a statement on Tuesday.

The 250,800-ton ship, which can carry nearly 8,000 people, has eight “neighborhoods” packed with amenities that include a 55-foot waterfall, six water slides and more than 40 restaurants, bars and entertainment venues.

Royal Caribbean’s announcement comes as the cruise industry reports record demand, attracting new customers with attractively priced packages that often include food, beverages and activities. In 2023, cruise travel exceeded 2019’s 29.7 million passengers by some two million, with 31.7 million passengers. This year, that number is expected to reach 34.7 million, according to Cruise Lines International Association, the industry’s trade group.

Responding to the demand, Royal Caribbean launched four new ships this year and has seven more on order. Other major cruise lines, like Carnival, Norwegian and MSC, are also launching next-generation vessels through 2027. The trend has drawn criticism from environmental groups, who warn that the number and scale of the ships undermine the industry’s commitment to a more sustainable future.