Vacations To Go offers a Carnival Cruise 7-Night Eastern Caribbean Cruise for Two with prices starting at $1,058. That's the lowest price we could find by $400. This roundtrip cruise aboard the Carnival Fascination departs from San Juan, Puerto Rico, on April 30 with stops in St. Thomas, USVI; Barbados; St. Lucia; St. Kitts; and St. Maarten. Book this deal by April 3.