Regent Seven Seas Explorer Click to see full answer. Also know, what is the most expensive cruise in the world? Symphony of the Seas Royal Caribbean International’s Oasis-class cruise ship Symphony of the Seas is the world’s largest passenger ship currently in service. Thus, for obvious reasons, Symphony of the Seas is one the most expensive cruise ships in the world now with a cost of production of $1.35 billion. which is the best cruise ship in the world? Keep reading to see which luxury cruise lines ranked the highest, according to LTI. Seabourn — 79.6% Crystal — 77.8% Regent Seven Seas — 76.9% Silversea — 75.4% Viking Ocean — 73.8% Oceania — 71% Azamara — 69.4% By StudioPortoSabbia / Shutterstock. Cunard — 67.7% By Freephotographer / Shutterstock. Accordingly, how much does it cost to stay on the world cruise ship? ms The World Suites cost – only USD 13,5 million(initially sold at USD 6 million). Short-term rentals – you can rent some of The World’s cruise apartments (depending on category) from ~USD 550 for a studio apartment (per person per night, min for 5 days) to suite rentals – from ~USD 20,000 a month.Which cruise line is most luxurious? Best Luxury Cruise Lines #1. Viking Ocean Cruises. #1 in Best Luxury Cruise Lines. #2. Seabourn Cruise Line. #2 in Best Luxury Cruise Lines. #3. Crystal Cruises. #3 in Best Luxury Cruise Lines. #4. Regent Seven Seas Cruises. #4 in Best Luxury Cruise Lines. #5. Azamara Club Cruises. #5 in Best Luxury Cruise Lines. #6. Oceania Cruises. #7. Silversea Cruises.