Icon of the Seas is the biggest cruise ship in the world, introduced in 2024 at 248,663 gross registered tons and 365 meters long. It carries 5,610 passengers at double occupancy and 7,600 at full capacity.
The scale changes how a sailing feels more than it changes the basics of planning. If you are new to the process, start with our guide on how to book a cruise, then use the sections below to judge whether a ship this large suits your trip.
How the record moved to Icon of the Seas
Royal Caribbean has repeatedly held the title of largest cruise ship by gross tons, and the record has passed from one of its ships to the next. The sequence, as reported in a port economics reference, runs in these stages:
- 2009: Allure of the Seas was the largest ship by gross tons.
- 2015: Harmony of the Seas took the title.
- 2020: Symphony of the Seas became the record holder.
- 2022: Wonder of the Seas, an Oasis-class ship, was built as the then-largest-ever ship.
- 2024: Icon of the Seas arrived as the new largest cruise ship.
Icon is not simply another Oasis-class ship like Wonder of the Seas. A report on the ship’s arrival in Miami describes it as the first new Royal Caribbean class in almost ten years, following the Quantum class of 2014. For a traveler, a new class means the ship is a fresh design rather than a larger copy of an earlier one, so comparisons with older Royal Caribbean ships are only a rough guide.
The ship also arrived in a busy cruise market. The same report notes that PortMiami saw 7.3 million passengers in the 2023 fiscal year.
Size and capacity compared
The quickest way to see what “biggest” means is to put Icon of the Seas beside the previous Royal Caribbean record holder for which full figures are available, Symphony of the Seas.
| Ship | Introduced as largest | Gross registered tonnage | Passengers at double occupancy | Maximum passengers | Planning use |
|---|---|---|---|---|---|
| Icon of the Seas | 2024 | 248,663 | 5,610 | 7,600 | Choose it when you want the widest choice of venues and are comfortable with a very large ship. |
| Symphony of the Seas | 2020 | 228,081 | 5,518 | 6,680 | A useful benchmark: still very large, with a smaller full-capacity ceiling. |
Tonnage and double-occupancy figures come from a port economics reference, and Symphony’s maximum passenger count comes from a Royal Caribbean dining feature.
Reading the tonnage figures
Icon of the Seas is larger than Symphony of the Seas by gross tonnage. Reports also vary slightly in how they state Icon’s gross tonnage. The port economics reference gives 248,663 GRT, while a Miami arrival report says over 250,800 gross tons. Treat both figures as describing the same ship by different reporting, not as different ships, and quote whichever source you are citing.
Length is another headline figure. The ship measures 365 meters, which the Miami report gives as 1,198 feet. Length alone says little about the experience, because it does not show how many decks or cabins the ship has. For that, the same report lists 2,850 staterooms and 18 guest decks.
Passenger capacity
Two capacity figures matter. The 5,610 figure is for double occupancy, with two guests per cabin. The 7,600 figure is the ceiling at full capacity. Treat the lower number as the more useful guide to what a typical cabin allocation looks like, and the higher one as a maximum rather than a target headcount.
Crew numbers add to the total onboard. Symphony of the Seas, for comparison, carries 2,200 crew, so a ship of this class operates as a floating town as well as a hotel.
What the scale means for passengers
A ship at this scale gives you choice rather than a different kind of holiday. Where a smaller ship offers a modest choice of restaurants and a pool area, a ship carrying this many guests has to spread them across many venues, and that spread is the main benefit and the main trade-off.
- More to choose from: the larger the ship, the more dining, entertainment and pool options it can run at once, so two guests in the same party can spend an afternoon in completely different ways.
- More movement: with 18 guest decks, getting between your cabin and a booked activity takes planning. Pick a cabin close to the areas you will use most.
- More reliance on booking ahead: popular venues on any large ship fill up, so check what needs a reservation before you sail.
- Less intimacy: if you want a small, quiet ship where the crew learn your name, a very large ship is the wrong tool, however impressive its numbers.
Speed is a separate question from size, and larger ships do not necessarily move faster between ports. Our guide on How Fast Do Cruise Ships Travel? Typical Speeds, What Affects Them, and Real-World Examples (2026 Guide) – Electracruises explains what governs a ship’s pace, which helps you read port times on any itinerary.
What there is to do onboard
The Miami arrival report lists the ship’s headline features: six water slides, pools, a plant-filled park and over 40 dining and drinking venues. That range is the practical meaning of the record.
Pools, slides and the park
Six slides and pools make the ship a strong choice for families and for anyone who wants an active sea day. The plant-filled park suits a different mood, a place to walk and sit rather than splash. Because both are on the same ship, a mixed group can split up during the day and meet for dinner without anyone compromising.
Dining and bars
The count of over 40 dining and drinking venues is large, but venue counts are not directly comparable between ships. A dining feature counts 65 restaurants, cafés, bars and lounges on Symphony of the Seas, and the figures come from different reports. Do not read them as a ranking of which ship has more to eat. When you compare fares or packages, look at which of Icon’s venues are specialty restaurants and how they are booked, since those are where your own choices shape the cost of the week.
The same feature says Symphony of the Seas is divided into seven neighborhoods, including the vintage-style Boardwalk. That layout shows how Royal Caribbean organizes its largest ships: by clusters of related venues rather than one long list. Use the deck plan to find the neighborhood that matches your priorities before you book a cabin.
Cabins
With 2,850 staterooms, the cabin choice is wide. The practical decision is which category you are paying for, and the sample fares below show where the price steps are largest.
What a cruise on Icon of the Seas costs
Fares depend heavily on sailing date, departure port and cabin type, so one listing is a benchmark and not a price list. A retailer listing for a 7-night sailing departing Galveston on Nov 6, 2027 shows the following per-person fares:
- Inside: $1,120
- Outside: $1,437
- Balcony: $1,571
- Suite: $3,472
The listing states that prices are per person based on double occupancy and include taxes and port charges. It also notes that its exclusive rates may include perks such as prepaid gratuities or beverage packages, so a retailer rate can differ from the cruise line’s own price. Check what is included before comparing two quotes.
The gaps tell you where to spend. In this sample, the balcony fare sits only modestly above the outside-cabin fare, so a guest who wants fresh air from the cabin gets a better step up there than the jump to a suite, which sits well above the other three categories. An inside cabin suits guests who plan to spend their time on the ship’s public decks and venues.
The sample itinerary sails from Galveston and includes Cozumel, Puerto Costa Maya and Perfect Day CocoCay. Icon therefore sails from more than one port, and the price for a Miami departure may differ from the figures above.
Who Icon of the Seas suits, and who should choose differently
Choose Icon of the Seas if you want a lot of variety on one booking: families with different ages, groups with mixed interests, and guests who like a ship that works as a destination of its own. The slides, pools, park and large venue count are built for that.
Look elsewhere if your priority is a calm, small-scale trip or time in historic towns rather than onboard activity. A very different kind of sailing, with small vessels and a focus on the places you pass, is covered in Best River Cruise Lines In Europe: The 2026 Guide To Luxury, Value, And Routes – Electracruises. For a first large-ship cruise, a balcony cabin near the venues you plan to use is a sensible way to get the benefit of the ship’s scale without paying suite prices.
Frequently asked questions
Which ship held the record before Icon of the Seas?
Wonder of the Seas, an Oasis-class ship built in 2022, was the then-largest-ever cruise ship before Icon of the Seas took the title in 2024.
Is Icon of the Seas the same class as Wonder of the Seas?
No. Wonder of the Seas is Oasis-class, while Icon of the Seas is the first ship of a new Royal Caribbean class, the first in almost ten years.
Do the sample fares include taxes?
Yes. The listed fares are per person, based on double occupancy, and include taxes and port charges. Retailer rates may also include perks such as prepaid gratuities or beverage packages.
Who operates Icon of the Seas?
Royal Caribbean International, which is based in Miami, developed the ship.
