At Avoya Travel, book one Royal Caribbean Cruise in an Balcony Cabin or better and get 50% off a second guest fare, as provided by Dunhill Travel. Plus, get up to $300 onboard credit free. That beats our mention from a month ago (which didn't include the additional credit) and yields several price lows. This sale includes cruises to the Caribbean, Bahamas, Europe, and Alaska. Some restrictions apply. This travel deal ends March 3.