Liberty Travel offers a Norwegian Cruise Line 7-Night Western Caribbean Cruise for Two bundled with a $50 onboard credit and $300 coupon book with prices starting at $1,598, as provided by Dunhill Travel. (It's the first offer on the left.) Assuming you use the credits, that's the lowest current rate we could find for this cruise by $10. This roundtrip cruise departs from Miami, FL, on September 20 and includes stops in Philipsburg, St. Maarten; St. Thomas, U.S. Virgin Islands; and Nassau, Bahamas. Some restrictions may apply; fees, government taxes, and fuel supplements are additional. This travel deal ends March 12.
Of note, Liberty Travel offers other Norwegian Cruise Line cruises with prices starting at $789 per person. Scroll down to see them all.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.