Cruise.com via ShermansCruise a Royal Caribbean 5-Night Eastern Caribbean Cruise for Two with prices starting from $373. (Scroll down on the landing page and click "Book Now" next to the May 5 sailing date. Although the landing page shows prices from $199 per person, the price drops during booking.) That's $159 under our December mention and the best price we've seen for this cruise. This cruise aboard the Adventure of the Seas departs on May 5 from San Juan, Puerto Rico, with debarkation in Cape Liberty, NJ. Book this travel deal by February 28.