Today only, Royal Caribbean Cruise Lines offers a 7-night cruise to the Greek Isles starting at $499, as found on Travelzoo. At around $71 per night (excluding taxes and fees), that's one of the best cruise deals we've seen from Royal Caribbean in several months. The cruise departs from Venice, Italy and includes stops in Split, Piraeus, Mykonos, and more. Prices are per person, based on double occupancy. Some restrictions may apply; fees, government taxes, and fuel supplements are additional.