Top 5 Biggest Cruise Ships May 2025 Update
5 Largest Cruise Ships in The World 2025
Updated 1 May 2025
Did you know that as of May 2025, there are 61 passenger ships with over 140,000 GT in service?
Here are the 5 biggest cruise ships
Are you wondering which is currently the biggest/largest cruise ship in the world? Often when people think of cruise ships, particularly if they have never cruised, they have a romantic idea of the elegant Ocean Liners of the past. However, most liners were much smaller even than today’s mid-sized cruise ships at less than 50,000 gt.
One of the few true liners in service today is Cunard’s Queen Mary 2, and at 149,215 GT she is the exception to the rule.
When we took our first cruise it was on P&O Cruises Aurora, which at just over 76,000 GT seemed absolutely huge to us. Things have moved on significantly and each class of ship seems to get much larger than the previous one.
With that in mind, at the risk of this post not aging well as newer and bigger ships are built, let’s take a look at five of the largest cruise ships currently in service. Interestingly, all five are operated by Royal Caribbean International - and that doesn’t seem to be about to change anytime soon.
1.Icon of the Seas (*Watch this space)
Icon of the Seas - the largest ship in the world 2024. Image: Royal Caribbean
Currently the World's Largest Cruise Ship (Dec 2024)
Icon of the Seas is the first ship of Royal Caribbean's new Icon Class of cruise ships. She is the largest cruise ship in service after late January 2024.
Class: Icon Class
Gross Tonnage: 248,663 GT
Length: 364.75 m (1,196.7 ft)
Beam: 48.47 m (159.0 ft)
Height: Approx 196 ft above waterline
No. Of Decks: 20
No. Of Cabins: 2,805
Capacity: 5,610 passengers
Crew: 2,350 crew
Built: 2024
Shipbuilder: MEYER TURKU, TURKU, FINLAND
Entered Service: 27 January 2024
Maiden voyage: January 2024
Cost: EUR 1,9 billion (USD 2 billion)
2. Utopia of the Seas
Utopia of the Seas Exterior. Image: Royal Caribbean
Class: Oasis Class
Gross Tonnage: 236,473GT
Length: 361.12 m (1,184.8 ft)
Beam: 64 m (210 ft)
Height: 73 m (240 feet)
No. Of Decks: 18
No. Of Cabins: 2,834
Capacity: 5,668 passengers
Crew: 2,200 crew
Built: 2018
Shipbuilder: Chantiers de l’Atlantique, Saint-Nazareth, France
Entered Service: July 2024
Maiden voyage: July 19, 2024
Cost: >£1billion ($1.3billion)
3.Wonder of the Seas
Wonder of the Seas Exterior. Image: Royal Caribbean
Class: Oasis Class
Gross Tonnage: 235,600[GT
Length: 362.04 m (1,187.8 ft)
Beam: 64 m (210 ft)
Height: 72.5 m (238 ft)
No. Of Decks: 18
No. Of Cabins: 2,867
Capacity: 6,988 passengers
Crew: 2,300 crew
Built: 2022
Shipbuilder: Chantiers de l’Atlantique, Saint-Nazareth, France
Entered Service: January 27, 2022
Maiden voyage: March 4, 2024
Cost: EUR 1,2 billion (USD 1,35 billion)
4. Symphony Of the Seas
The Previous Crown-Holder, Symphony of the Seas has moved to second place in World’s Biggest Cruise Ships. Image: RCI
Class: Oasis Class
Gross Tonnage: 228,081 GT
Length: 362.1 m (1,184 ft)
Beam: 65.7 m (215.5 ft)
Height: 72.5 m (238 ft)
No. Of Decks: 18
No. Of Cabins: 2,759
Capacity: 5,400 passengers
Crew: 2,200 crew
Built: 2018
Shipbuilder: Chantiers de l’Atlantique, Saint-Nazareth, France
Entered Service: 31 March 2018
Maiden voyage: 7 April 2018
Cost: US$1.35 billion
5. Harmony of the Seas
Harmony of the Sea ranked third largest cruise ship in the World (as at June 2024). Image: Royal Caribbean International
Class: Oasis Class
Gross Tonnage: 226,963 GT
Length: 362.12 m (1,188.1 ft)
Beam: 65.7 m (215.5 ft)
Height: 70 meters (238 ft)
No. Of Decks: 18
No. Of Cabins: 2,747
Capacity: 5,494 passengers
Crew: 2,100 crew
Built: 2016
Shipbuilder: Chantiers de l’Atlantique, Saint-Nazareth, France
Entered Service: May 15, 2016
Maiden voyage: May 29, 2016
Cost: $1.35 billion (£695 million)
*Whilst at the time of writing (and indeed for the first half of 2025) this is true, Royal Caribbean’s new ship Star of the Seas® will usurp her sister ship Icon of the seas and take the crown of Biggest Ship in the World.