Royal Caribbean extends sailing season for Quantum of the Seas from Singapore Toggle share menu Advertisement Royal Caribbean extends sailing season for Quantum of the Seas from Singapore FILE PHOTO: Royal Caribbean's Quantum of the Seas cruise ship docks at Marina Bay Cruise Centre in Singapore on Dec 9, 2020. (Reuters/Edgar Su) 01 Apr 2021 11:54AM) Share this content Bookmark SINGAPORE: Royal Caribbean International's Quantum of the Seas will continue sailing from Singapore until October 2021, the company announced on Thursday (Apr 1). The cruise line's 11-month Singapore season, which resumed sailing last December, will mark the longest yet for one of Asia's largest cruise ships.