Take a week off this spring and sail through the crystal-blue waters of the Caribbean in a balcony cabin for $599 per person.

These cabins -- which usually cost a premium because of their larger size, floor-to-ceiling sliding-glass doors and oceanfront views -- are available on Celebrity Solstice or Eclipse for less than the price of inside cabins.

This limited-time offer has been extended for bookings by Friday, March 18 and includes:

• $100 in onboard credit per cabin
• Free upgrades to higher-category balcony cabin -- book early for the best upgrade
• Upgrades to Concierge Class for $50 more for perks such as priority check-in, a bottle of champagne and fresh flowers

Depart from Miami or Ft. Lauderdale on March 19, 20, 26, 27; April 2, 3, 9, 10, 24 (Easter Sunday).

These cruises feature both eastern and western Caribbean itineraries with stops in such popular locales as Grand Cayman, St. Thomas, St. Maarten and San Juan.

The Celebrity Solstice was named the top mega ship by Conde Nast Traveler in 2010, and the Eclipse is the newest ship in Celebrity's fleet. Celebrity is ranked one of the top 10 large cruise lines by Travel & Leisure.

Taxes of $83-$108 per person are additional.