Is Odyssey of the Seas the biggest ship? If you're wondering of Odyssey of the Seas is the biggest cruise ship in Royal Caribbean's fleet or the biggest cruise ship in the world, the answer to both questions is "no".

No, Odyssey of the Seas is not the biggest cruise ship in the world, nor is it the largest in the Royal Caribbean fleet. It belongs to the Quantum Ultra Class, with a gross tonnage of approximately 169,300 GT. While it is a massive and high-tech vessel, it is significantly smaller than the Icon Class and Oasis Class ships. As of 2026, the title of "World's Largest Cruise Ship" belongs to Icon of the Seas (and its sister ship Star of the Seas), which boast a staggering 250,800+ GT and can carry nearly 7,600 passengers. Even the older Oasis-class ships, like Wonder of the Seas, are nearly 40% larger than Odyssey. Odyssey of the Seas is instead designed for "high-feature" cruising rather than "mega-scale" cruising, offering unique amenities like the North Star observation capsule and the SeaPlex indoor sports hub. It is the perfect ship for those who want the latest tech and "wow" features without the overwhelming footprint and crowd size of the record-breaking Icon-class vessels.