The content originally appeared on: CNN Editor's Note - Sign up for Unlocking the World, CNN Travel's weekly newsletter. Get news about destinations opening and closing, inspiration for future adventures, plus the latest in aviation, food and drink, where to stay and other travel developments. (CNN) - All around the world, restrictions are easing for vaccinated travelers, and more and more people will soon be on the move. But with traffic set to rise, airlines are keen to put a […]