Wondering what a trip to Key West might cost? If travel to Key West is in your future, whether by plane or driving the Overseas Highway, this guide will give you an idea of what a Key West itinerary actually costs. Over 5 days, this is what we actually spent strolling Duval, on popular things to do like Dry Tortugas National Park, and our well-located Key West hotel. Contains essential tips for saving money and what is worth the splurge.