Top 10 Biggest Cruise Ships in the World in 2025

In 2025, engineering wonders that redefine luxury, entertainment, and size will continue to wow the cruise industry. These vessels represent the height of maritime innovation and are run by major players in the industry such as Royal Caribbean International, MSC Cruises, Costa Cruises, and P&O Cruises.

List Of Top 10 Biggest Cruise Ships in the World in 2025

1. Icon of the Seas – 250,800 GT:

Icon of the Seas was launched in January 2024 and, as of 2025, holds the title of largest cruise ship in the world. This Icon-class ship, which was constructed by Meyer Turku in Finland for Royal Caribbean International, is 364.75 meters (1,196.7 feet) long and has a gross tonnage of 250,800. It is a floating metropolis with 20 decks, 18 of which are accessible to passengers, and a capacity of 5,610 double-occupancy passengers (up to 7,600 maximum) and 2,350 crew members. It is a pioneer in environmentally friendly cruising, powered by liquefied natural gas (LNG). Among its eight neighborhoods are Chill Island, which has the biggest pool at sea, and Thrill Island, which has a Category 6 waterpark with six record-breaking slides. The glass-domed AquaDome for acrobatic shows, a 55-foot indoor waterfall, and more than 40 dining and drinking options make it unique. Icon of the Seas sets the standard for megaships, operating year-round Caribbean itineraries from Miami.

2. Utopia of the Seas – 236,860 GT:

With a gross tonnage of 236,860, Royal Caribbean's sixth Oasis-class ship, Utopia of the Seas, made her debut in July 2024 and is one of the biggest. This 362-meter (1,188-foot) LNG-powered ship, which was built by Chantiers de l'Atlantique in France, can accommodate 5,668 people at double occupancy (6,771 maximum) and 2,290 staff members spread across 18 decks. It is designed for quick, exuberant 3- and 4-night voyages to Royal Caribbean's private island, Perfect Day at CocoCay. Highlights include the 259-foot Ultimate Abyss dry slide, the longest at sea, the Royal Railway, and an immersive train-carriage eating experience. It combines sustainability and spectacle with five pools, more than 20 restaurants, and entertainment like the AquaTheater. It departs from Port Canaveral, Florida, in 2025 and provides exciting, short getaways.

3. Wonder of the Seas – 236,857 GT:

Before Icon of the Seas overtook it, Wonder of the Seas, which made its debut in March 2022, was the largest cruise ship in the world. It is a 362-meter (1,188-foot) Royal Caribbean Oasis-class ship with a gross tonnage of 236,857. Constructed by Chantiers de l'Atlantique, it has 18 decks that can hold 2,300 crew members and 5,734 passengers at double occupancy (7,084 maximum). Among its eight communities are the adults-only Solarium and the Boardwalk, which features a hand-carved carousel. While the Vue Bar provides expansive views of the ocean, thrill-seekers can enjoy the Perfect Storm waterslides, a zip line, and twin FlowRider surf simulators. It offers huge family-friendly luxury when it sails Caribbean itineraries from Port Canaveral in 2025.

4. Symphony of the Seas – 228,081 GT:

Up until 2022, Symphony of the Seas, which debuted in April 2018, was the biggest cruise ship in the world. Built by STX France (now Chantiers de l'Atlantique), this Oasis-class ship is 361 meters (1,184 feet) long and has a gross tonnage of 228,081. Over 18 decks, it can accommodate 2,200 crew members and 5,518 passengers in double occupancy (6,680 maximum). It has 42 bars and 22 restaurants along the Royal Promenade and is well-known for its 10-story Ultimate Abyss slide and laser-tag arena. Broadway-style plays like Hairspray and high-dive shows at the AquaTheater are examples of entertainment. In 2025, it will travel the Mediterranean from Barcelona and Rome in the summer and switch to the Caribbean from Fort Lauderdale in the winter.

5. Harmony of the Seas – 226,963 GT:

With a gross tonnage of 226,963 and a length of 362 meters (1,188 feet), Harmony of the Seas was the first Oasis-class ship constructed by STX France and launched in May 2016. Across 18 decks, it accommodates 2,100 crew members and 5,479 passengers at double occupancy (6,780 maximum). Three waterslides, two FlowRider surf simulators, and a Central Park with more than 10,000 plants are among the attractions. Fuel efficiency is improved by its environmentally friendly features, such as multi-stream exhaust scrubbers. In 2025, it provides a blend of leisure and adventure on two continents, operating from Barcelona in the summer and Galveston, Texas, in the winter.

6. Oasis of the Seas – 226,838 GT:

Oasis of the Seas, the original Oasis-class ship from Royal Caribbean, made her debut in December 2009. It was constructed by STX Finland (now Meyer Turku) and is 360 meters (1,181 feet) in length with a gross tonnage of 226,838. Over 18 decks, it can accommodate 2,165 crew members and 5,400 passengers at double occupancy (6,699 maximum). Its seven-neighborhood layout established a new benchmark for cruise ships by introducing the Boardwalk and Central Park. It was renovated in 2019 and now has a concert hall and Perfect Storm waterslides. Its continued popularity is demonstrated by the fact that in 2025 it will sail Caribbean itineraries from Miami in the winter and Mediterranean routes from Barcelona in the summer.

7. Allure of the Seas – 225,282 GT:

The second Oasis-class ship, Allure of the Seas, which had a gross tonnage of 225,282 and measured 360 meters (1,181 feet) in length, was launched in December 2010. It was constructed by STX Finland and has 18 decks that can hold 2,384 crew members and 5,492 passengers in double occupancy (6,780 maximum). With amenities like the AquaTheater and the Rising Tide Bar, a movable platform between decks, it is slightly smaller than its siblings but still has the same famous seven-neighborhood arrangement. Water slides and modernized dining were included during a 2020 renovation. In 2025, it offers a traditional Oasis-class experience with contemporary touches, sailing from Barcelona in the summer and Galveston, Texas, in the winter.

8. MSC World Europa – 205,700 GT:

Launched in December 2022, MSC World Europa is the first of its World class and the largest ship in MSC Cruises' fleet. It was constructed by Chantiers de l'Atlantique and is 333 meters (1,092 feet) in length with a gross tonnage of 205,700. Across 22 decks, it can accommodate 2,138 crew members and 5,240 passengers in double occupancy (6,762 maximum) (19 passenger-accessible). It is powered by LNG and has a modern Y-shaped aft with a 104-meter World Promenade, a 250-foot Venom Drop slide, and a Kinetic Dome for immersive shows. In 2025, it will combine European elegance with megaship grandeur, sailing year-round Mediterranean itineraries from Barcelona and Genoa with 13 dining locations and eco-friendly technology.

9. Costa Toscana – 186,200 GT:

A flagship ship in Costa Cruises' Excellence class, the Costa Toscana was introduced in December 2021. It was constructed by Meyer Turku and has a gross tonnage of 186,200. It is 337 meters (1,106 feet) long. It can hold 1,646 crew members on 19 decks (16 passenger-accessible) and 5,224 passengers at double occupancy (6,554 maximum). With facilities like the Solemio Spa and the Colosseum atrium, which has three-story LED screens, it is an example of Italian design and is powered by LNG. Its 19 bars and 11 restaurants honor Italy's culinary legacy, while family will enjoy the waterpark's slides. It offers a fusion of leisure and culture when it sails Mediterranean routes from Savona to Barcelona in 2025.

10. Arvia – 184,700 GT:

Meyer Werft in Germany built the second Excellence-class ship for P&O Cruises, Arvia, which was launched in December 2022. It has a gross tonnage of 184,700 and is 344.5 meters (1,130 feet) long. It can accommodate 1,800 crew members and 5,200 passengers at double occupancy (6,264 maximum) on 19 decks (16 passenger-accessible). It is powered by LNG and has the first rum distillery at sea as well as the SkyDome, a glass-roofed pool area. With a contemporary twist, its four pools, twelve dining options, and Altitude Skywalk ropes course appeal to British tastes. In 2025, it will represent P&O's "sunshine ship" philosophy by sailing Mediterranean routes from Southampton in the summer and Caribbean itineraries from Barbados in the winter.