Liberty Travel offers a Royal Caribbean International 6-Night Western Caribbean Cruise for Two with prices starting from $772.50, as provided by Dunhill Travel. (It's the first offer on the top row; note that this fare includes one full fare and one half-price fare.) That's the lowest price we could find by $546. This roundtrip cruise aboard the Navigator of the Seas departs from Fort Lauderdale, FL, on December 6 and includes stops in George Town, Grand Cayman; Falmouth, Jamaica; and Labadee, Haiti. Book this travel deal by August 30.
Of note: Liberty Travel cuts 50% off other second-person fares on other Royal Caribbean International Cruises, including cruises to Alaska, Europe, Bermuda, Bahamas, and more.