Cruise.com via ShermansCruise offers a Royal Caribbean 3-Night Bahamas Cruise for Two, with prices starting from $328. (On the ShermansCruise landing page scroll down and click “Book Now” next to the October 29 sailing date.) That’s the lowest price we’ve seen for a 3-night Royal Caribbean cruise and the best price we could find for such a cruise now by $258. This roundtrip cruise aboard the Mariner of the Seas departs on October 29 from Miami, FL. Additional fees may apply. Book this travel deal by August 31.