Update (2:00 pm PT, March 15): This sale has been extended for bookings through March 19.

A seven-night Caribbean cruise on a top-rated ship is reduced to $499 per person -- half off what these sailings typically cost. Additionally, book by Friday and receive $150 onboard credit per cabin to spend on anything from drinks to shore excursions.

Sail on one of three Royal Caribbean ships from:

• Port Canaveral: Freedom of the Seas ... Sept. 8, 22, 29
• San Juan, Puerto Rico: Jewel of the Seas ... Dec. 7
• New Orleans: Serenade of the Seas ... Jan. 4, 11, 18, 25; Feb. 1, 8

Freedom of the Seas and Serenade of the Seas were named to the 100 Best Ships List in the 2013 Conde Nast Traveler Readers' Poll. Depending on the itinerary, experience the islands of St. Thomas, St. Maarten, Caymans, St. Croix, St. Lucia and Cozumel. 

Balcony, oceanview and suite cabins are available at higher rates and come with additional extras.

Note: Taxes are an additional $84-$110 per person.

Click here for more information, including additional sail dates. This deal is part of a larger sale featuring six-night and longer Caribbean sailings through April 2014 on Royal Caribbean.