Ever wondered what the largest airports in the world are? After all, airports are vast pieces of infrastructure that stretch across tens or hundreds of square miles. Using land area, this list looks at the largest airports in the world by physical size, ranking them purely on how much ground they occupy. As for our source and methodology: This ranking is based on data compiled by World Atlas, which measures the total land area owned and managed by each airport authority. King Fahd International Airport, Saudi Arabia: about 300 square milesGeometrical motives of King Fahd International Airport / Dammam International Airport mtcuradoThe largest airport in the world by a staggering margin, King Fahd International Airport sprawls across the desert near Dammam, with much of its land reserved for long-term expansion.