Posted: via ShermansCruise a Royal Caribbean 5-Night Eastern Caribbean Cruise for Two with prices starting from $518. (Scroll down on the landing page and click "Book Now" next to the May 5 sailing date.) That's the lowest price we could find for such a cruise in May by $242. 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 April 30.