Carnival Cruises from San Juan, PR features a 7-night Southern Caribbean cruise itinerary. When it comes to island hopping, the 7-night Southern Caribbean itinerary is outstanding. The cruise departs San Juan on Sundays and calls on St. Thomas, Dominica, Barbados, St. Lucia, Antigua and St. Kitts. San Juan is home port to one of Carnival's best ships, the Carnival Victory. Tip: Looking for a bargain on a Carnival San Juan Cruise? The lowest prices are in January, February and March. If airfare to San Juan is prohibitively expensive, and, you have two options. You can catch the exact same 7-night itinerary, only you board the ship in Barbados. Alternatively, the 8-night Southern Caribbean sailings offered by Carnival Cruises from Fort Lauderdale is a great option with some high-quality "island hopping".