What Is The Biggest Cruise Ship 2024 List. The royal caribbean’s icon of the seas is the biggest cruise ship in the world. The largest cruise ship currently in service is royal caribbean's wonder of the seas, at more than 235,000 gross tons.

(2) symphony of the seas (3) harmony of the seas (4) oasis of the. Miami (ap) — the world’s largest cruise ship — the size of almost four city blocks — is set to begin its maiden voyage saturday as it leaves from the port of miami.