CheapCruises offers a Royal Caribbean Cruise Line 7-Night Eastern Caribbean Cruise for Two bundled with $100 Onboard Credit with prices starting from $1,228. That's $28 under our mention from three weeks ago and, assuming you use the credit, it's also the lowest price we could find by $100. This roundtrip cruise aboard the Allure of the Seas departs from Fort Lauderdale, FL, on January 29, 2017 and includes stops in Nassau, the Bahamas; Charlotte Amalie, St.