These Are the Busiest Airports in the World (and in Canada, too) By Notable Life By Notable LifeView Author|September 1, 2015|Life,View Life TravelView Travel You may want to think twice before booking a connecting flight through Atlanta if crowds make you anxious. For the 17th year in a row, Atlanta retained the title of the busiest passenger airport in the world in 2014, according... View this article.