What Is The Biggest Cruise Ship 2025. Spanning nearly 1,200 feet, the cruise ship has 20 decks, which makes the icon of the seas the world's largest cruise ship. Icon of the seas will debut in early 2025 as the world’s largest cruise ship at more than 250,000 gross tons.
It’s currently in miami preparing to set sail on 27 january. Royal caribbean’s newest ship, named icon of the seas, has become the largest in the world after setting sail on 27 january 2025.