15 Largest Cruise Ships Currently Sailing
When people think about cruise ships, they often picture large floating hotels. Today’s cruise ships have evolved into something far more impressive—floating cities that can carry thousands of passengers while providing amenities that rival the finest land-based resorts.
The cruise industry has pushed the boundaries of engineering and design to create vessels that seem to defy physics. Here is a list of 15 of the largest cruise ships currently sailing the world’s oceans.
Icon of the Seas
Icon of the Seas is the largest cruise ship in the world by gross tonnage. The ship has a crew of 2,350, and a capacity of 5,610 passengers at double occupancy, or 7,600 passengers at maximum capacity.
Icon of the Seas has 20 decks with seven swimming pools and six water slides. This Royal Caribbean masterpiece began sailing in January 2024 and represents the pinnacle of cruise ship design.
Wonder of the Seas
As of March 2022, the fifth Oasis-class ship, Wonder of the Seas, was the largest cruise ship in the world. Wonder of the Seas held the title of world’s largest cruise ship until Icon of the Seas launched in 2024.
This Royal Caribbean vessel can accommodate over 6,900 passengers and features seven distinct neighborhoods spread across multiple decks.
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Utopia of the Seas
A sixth ship, Utopia of the Seas, slightly larger than the previous one, followed in July 2024 This newest addition to Royal Caribbean’s Oasis class represents the latest evolution in cruise ship design. Utopia of the Seas incorporates lessons learned from her sister ships while introducing new amenities and enhanced passenger experiences.
Symphony of the Seas
A fourth vessel, Symphony of the Seas, was completed in March 2018. Symphony of the Seas was the world’s largest cruise ship when she debuted and continues to impress with her size and amenities.
The ship features a full-size carousel, multiple pools, and entertainment venues that rival Broadway theaters.
Harmony of the Seas
A third Oasis-class vessel, Harmony of the Seas, was delivered in 2016 built by STX France. Harmony of the Seas brought fresh innovations to the Oasis class when she joined the fleet eight years ago.
The ship includes a 10-story slide called The Ultimate Abyss and bionic bartenders that mix perfect drinks every time.
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Allure of the Seas
The first two ships in the class, Oasis of the Seas and Allure of the Seas, were delivered respectively in 2009 and 2010 by STX Europe Turku Shipyard, Finland. Allure of the Seas was the world’s largest cruise ship when she launched over a decade ago.
The ship proved that passengers wanted more than just transportation—they wanted a complete vacation experience on the water.
Oasis of the Seas
Oasis of the Seas is a cruise ship operated by Royal Caribbean International. She is the first of her class, the Oasis class, whose ships were the largest passenger ships in the world, until surpassed in 2023 by the Icon class.
At the time of construction, Oasis of the Seas set a new capacity record of carrying over 6,000 passengers. This groundbreaking vessel revolutionized the cruise industry by introducing the concept of neighborhoods at sea.
MSC World Europa
MSC World Europa represents the European perspective on large cruise ships. This vessel incorporates cutting-edge environmental technology while maintaining the luxury and amenities passengers expect from a mega-ship.
The ship features an impressive promenade and multiple dining venues that showcase international cuisines.
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Norwegian Encore
Norwegian Encore brings Norwegian Cruise Line’s freestyle cruising philosophy to the large ship segment. The vessel features go-kart racing tracks, laser tag arenas, and virtual reality experiences that appeal to adventure-seeking passengers.
Norwegian Encore proves that large ships can still deliver personalized experiences.
Carnival Mardi Gras
Carnival Mardi Gras marked Carnival Cruise Line’s entry into the large ship category with style and flair. The ship features the first roller coaster at sea, along with multiple themed zones that cater to different passenger preferences.
Carnival Mardi Gras demonstrates that fun doesn’t have to be sacrificed for size.
Royal Caribbean’s Voyager Class Leaders
Several ships from Royal Caribbean’s Voyager class continue to rank among the world’s largest vessels. These ships pioneered many features that have become standard on modern cruise ships, including rock climbing walls, ice skating rinks, and promenade shopping areas.
The Voyager class proved that bigger could indeed be better when done right.
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Celebrity Beyond
Celebrity Beyond represents Celebrity Cruises’ approach to large luxury vessels. The ship combines impressive size with sophisticated design elements that appeal to discerning travelers.
Celebrity Beyond features multiple specialty restaurants, expansive suites, and art installations that rival those found in major museums.
MSC Grandiosa
MSC Grandiosa brings Mediterranean elegance to the large cruise ship market. The vessel features a stunning promenade with LED sky dome, multiple pools, and dining options that celebrate European culinary traditions.
MSC Grandiosa shows that large ships can maintain cultural identity while accommodating thousands of passengers.
P&O Iona
P&O Iona represents the British approach to large cruise ships with features tailored specifically for UK passengers. The ship includes traditional British pubs, fish and chips shops, and entertainment that reflects British culture.
P&O Iona proves that large ships can serve specific market preferences while maintaining impressive scale.
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Costa Smeralda
Costa Smeralda brings Italian style and flair to the large cruise ship segment. The vessel features a distinctive funnel design and interior spaces that celebrate Italian design traditions.
Costa Smeralda demonstrates that large ships can maintain strong cultural identities while providing modern amenities and entertainment options.
Engineering Marvels Sailing Today
The construction of these massive vessels represents some of humanity’s greatest engineering achievements. Modern cruise ships must balance enormous size with fuel efficiency, environmental responsibility, and passenger safety.
These floating cities operate complex systems that rival those found in actual cities, including water treatment plants, power generation facilities, and waste management systems that would serve communities of similar size on land.
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