Side-by-side cruise ship comparison · Updated January 2026
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across 5 categories
Size
Based on gross tonnage and length
Capacity
Based on passengers and crew
Modernity
Based on year built
Service
Based on passenger-to-crew ratio (lower is better)
Spaciousness
Based on gross tonnage per passenger (higher is better)
Harmony of the Seas
Odyssey of the Seas
Gross Tonnage
Harmony of the Seas
226,963 GT
Odyssey of the Seas
169,379 GT
Length
Harmony of the Seas
362 m
Odyssey of the Seas
347 m
Beam
Harmony of the Seas
66 m
Odyssey of the Seas
41 m
Passengers
Harmony of the Seas
6,687
Odyssey of the Seas
4,198
Crew
Harmony of the Seas
2,100
Odyssey of the Seas
1,551
Decks
Harmony of the Seas
—
Odyssey of the Seas
—
Year Built
Harmony of the Seas
2,016
Odyssey of the Seas
2,021
Space Ratio
Harmony of the Seas
33.9 GT/pax
Odyssey of the Seas
40.4 GT/pax
Passenger:Crew Ratio
Harmony of the Seas
3.18 :1
Odyssey of the Seas
2.71 :1
| Specification | Harmony of the Seas | Odyssey of the Seas |
|---|---|---|
| Overview | ||
| Cruise Line | Royal Caribbean International | Royal Caribbean International |
| Class | Oasis Class | Quantum Ultra Class |
| Status | active | active |
| Year Built | 2,016 | 2,021Winner |
| Dimensions | ||
| Gross Tonnage | 226,963 GTWinner | 169,379 GT |
| Length | 362 mWinner | 347 m |
| Beam | 66 mWinner | |
| Capacity | ||
| Passengers | 6,687Winner | 4,198 |
| Crew | 2,100Winner | 1,551 |
| Key Ratios | ||
| Space Ratio | 33.9 GT/pax | 40.4 GT/paxWinner |
| Passenger:Crew Ratio | 3.18:1 | 2.71:1Winner |
| Build | ||
| Builder | STX France | Meyer Werft |
| Flag | Bahamas | Bahamas |
| IMO Number | 9682875 | 9795737 |
Harmony of the Seas is the significantly larger vessel at 226,963 GT — 34% more than Odyssey of the Seas's 169,379 GT. Odyssey of the Seas offers more personal space with a space ratio of 40.4 GT per passenger versus 33.9. Built in 2021, Odyssey of the Seas is 5 years newer — an advantage for travellers seeking modern amenities and design.
| Category | Winner |
|---|---|
| Size | Harmony of the Seas |
| Capacity | Harmony of the Seas |
| Modernity | Odyssey of the Seas |
| Service | Odyssey of the Seas |
| Spaciousness | Odyssey of the Seas |
Bottom line: Odyssey of the Seas wins more categories (3 vs 2), making it the stronger all-round choice based on current data.
Harmony of the Seas
Large 6,687-guest capacity offers competitive pricing
6,687 passengers means tons of activities
Built in 2016 with modern facilities — great for a first cruise
Comfortable atmosphere for two
Odyssey of the Seas
Built in 2021 with modern facilities — great for a first cruise
4,198 passengers means tons of activities
Large 4,198-guest capacity offers competitive pricing
40 GT/pax means plenty of quiet space
Free cancellation on most rooms
Bundle & save on your cruise trip
Medical, trip cancellation & luggage cover
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41 m |
| Draft | 9.3 mWinner | 8.8 m |
| Decks | — | — |
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